PCR-1000

GM4JJJ ICOM IC-PCR1000 Page

The Icom IC-PCR1000 Communications Receiver covers 10KHz to 1300MHz and is totally controlled via an RS232 serial port. The only physical control on the black box is an On/Off switch!

PCR1000 Command List

The ICOM PCR1000 Computer Controlled Radio Command Protocol has not been published by ICOM, however I have compiled this list from various sources.

Warning: I take no responsibility for the accuracy of any of the following, you use it at your own risk! - Make sure you have a backup of your EEPROM before trying any experimentation!

Updated 10 JAN 2002

All commands are sent is ASCII in the format: Command + CR + LF CR = chr$(13) LF = chr$(10) EXCEPT when in AUTOUPDATE mode (see G3xx command), when NO CR + LF IS REQUIRED after the Command Note that no G0XX is returned in autoupdate mode Some responses from the PCR1000 have an added character at the end of the response string. It is usually a duplicate of the last character of the string and can be discarded. (A bug, I suppose) DTR and RTS set high by software. When radio is first turned on, the software send the following commands: initial boot up at 9600 Baud. H101 Turn Radio ON G105 Set Baud rate to 38400 Baud G300 Set Autoupdate to OFF H1? Is radio still ON? Responds H100 for OFF, H101 for ON H101 Radio ON command G4? Possible Inquire Firmware Revision? US and UK version returns G410 G301 Auto Update ON GE? Inquire Country/Region returns GE09 in FCC USA version and GE02 in EUR/AUS version GD? Is DSP Installed? Returns GD00 if NO, GD01 if Yes K00857937500050200 Set Frequency and mode and filter J4100 Set Squelch J5100 See Tone Squelch J5000 Set VSC off J4380 Set IF Shift to mid range J4500 Set AGC OFF J4600 Set Noise Blanker OFF J4700 Set Attenuator OFF J4A80 Not known LD82000 Set Tracking Filter to Automatic J8001J8101J8200J8301 DSP Packet. See DSP commands below J4000 Set Volume ME0000120050100012500 Set Bandscope ON to +- 200 Khz and 12.5 Khz step ' This is returned when Bandscope first turned ON NE100000000000000000000000000000000000 NE110000000000000000000000000000000000 NE120000000000000000000000000000000000 NE130000000000000000000000000000000000 NE140000000000000000000000000000000000 NE150000000000000000000000000000000000 NE160000000000000000000000000000000000 NE170000000000000000000000000000000000 NE190000000000000000000000000000000000 NE1A0000000000000000000000000000000000 NE1B0000000000000000000000000000000000 NE1C0000000000000000000000000000000000 NE1D0000000000000000000000000000000000 NE1E0000000000000000000000000000000000 NE1F0000000000000000000000000000000000 _____________________________________________________ Command Status: G0xx where xx = 00 when command is Good, 01 when command is Bad Signal Update: G3xx 00 = off (Program needs to Poll status) See I1? to I3? below 01 = on (Radio sends Status when a parameter changes) See Ix? commands 02 = binary mode (Update off) 03 = binary mode (Update on) Inquire signal information. These commands can be Polled or are returned as a packet if Autoupdate is ON (See G301) and one of the values changes. I0? Squelch Status returns 04 = Closed, 07 = Open I1? Signal Strength returns 00 to FF I2? Signal Centering returns 00 = Low, 80 = Centered, FF = High I3? DTMF Tone returns I300 if NO DTMF tone present returns I31 + ASCII digit 0 to F (* = E, # = F) Alive: H1? Is radio alive? Radio responds H101 (on) or H100 (off) Volume: J40xx xx Range 00 to FF Squelch: J41xx xx Range 00 to FF IF Shift: J43xx xx Range 00 to FF AGC: J45xx xx = 01 for ON, 00 for OFF NB: J46xx xx = 01 for ON, 00 for OFF Attenuator: J47xx xx = 01 for ON, 00 for OFF VSC: J50xx xx = 01 for ON, 00 for OFF T Squelch on = J51tt (tt=tone , 01=67Hz, 33=254.1Hz) T Squelch off = J5100 Frequency: K0GMMMKKKHHHmmff00 where K0 G MMM KKK HHH mm ff 00 G=GHz MMM=MHz KKK=KHz HHH=Hz mm = mode ff = Filter 00 = Padding Bytes (always there) Mode Settings: 00 = LSB 01 = USB 02 = AM 03 = CW 04 = Not used or Unknown 05 = NFM 06 = WFM Filter Settings: 00 = 3 Khz (actually 2.8 Khz) (CW USB LSB AM) 01 = 6 Khz (CW USB LSB AM NFM) 02 = 15 Khz (AM NFM) 03 = 50 Khz (AM NFM WFM) 04 = 230 Khz (WFM) Radio Replies I0xx Squelch Status xx=04 Closed, 07 Open I1ss ss is Signal Strength 00 to FF I200 Signal Frequency < Display Frequency I280 Signal Frequency = Display Frequency I2FF Signal Frequency > Display Frequency I300 No DTMF Present I31t t is DTMF tone (* = E, # = F) Baud Rate G1xx where xx is: 00 = 300 01 = 1200 02 = 4800 03 = 9600 04 = 19200 05 = 38400 Signal Update G3xx 00 = off (Program needs to inquire signal strength, DTMF tone, Center, etc) 01 = on (Radio sends signal strength, DTMF tone, etc as needed) 02 = binary mode (Update off) 03 = binary mode (Update on) __________________________________________________________ Icom PCR1000 Band Scope commands. The basic command to turn the bandscope function On is: ME0000120050100012500 + CR + LF The command breaks down this way: ME00001 20050100012500 ME00001 is the preamble. It's always the same. ME00001 20 050100012500 20 is the number of samples. It must be a 2 digit HEX number represented in ASCII. Add leading 0 if necessary. Calculate this number by dividing the Scope Bandwidth by the step size. For example in the +- 200 Khz span the total bandwidth is 400 Khz. If the step size is 12.5 khz then 400/12.5 is 32 or 20 Hex. If you get a non integer answer for the initial division then increment the sample number by 1 or 2 (sample should be an EVEN number). You can arbitrarily set the sample higher(SLIGHTLY) to allow the display to be moved inward from the edges of the scope display. ME0000120 05 0100012500 05 is a sample rate value that determines how fast the scope is swept and in the Icom software is either 05 or 28. This is interpreted as a hex number and must be 2 digits. The practical values for this runs from 01 (very fast and resource intensive) to about 70 (very slow and nearly useless). Putting 00 here locks the PCR1000 and software up. In the Icom software the number of samples determine this value. Sample numbers above 10 hex use 05 and those 10 Hex or lower use 28 Hex. ME000012005 01 00012500 01 This is the On/Off characters. If they are 00 then the bandscope is OFF. If they are 01 the bandscope is ON ME00001200501 00 012500 00 is a padding value and must be there. ME0000120050100 012500 012500 is the step size expressed in HERTZ. It must be 6 digits long, padded with LEADING ZEROS. Examples are 001000 for 1000 hertz (1 Khz), 030000 for 30 Khz and 100000 for 100 Khz. The bandscope accepts values down to at least 10 hertz but the Icom software displays a LIMIT warning at 1 Khz and at 100 Khz. The Band Scope commands appear to be insensitive to mode and bandwidth except for the fact that it doesn't work in USB, LSB or CW. It has been hypothesized that the product detector circuitry is used by the Band Scope. Typical Band Scope Commands: ME00001C8050100001000 +- 100 Khz @ 1 Khz ME0000164050100001000 +- 50 ME0000132050100001000 +- 25 ME00001A0050100002500 +- 200 Khz @ 2.5 Khz ME0000150050100002500 +- 100 ME0000128050100002500 +- 50 ME0000114050100002500 +- 25 ME0000150050100005000 +- 200 Khz @ 5.0 Khz ME0000128050100005000 +- 100 ME0000114050100005000 +- 50 ME000010A280100005000 +- 25 ME0000140050100006250 +- 200 Khz @ 6.25 Khz ME0000120050100006250 +- 100 ME0000110280100006250 +- 50 ME0000108280100006250 +- 25 ME000012E050100009000 +- 200 Khz @ 9.0 Khz ME0000118050100009000 +- 100 ME000010C280100009000 +- 50 ME0000106280100009000 +- 25 ME0000128050100010000 +- 200 Khz @ 10.0 Khz ME0000114050100010000 +- 100 ME000010A280100010000 +- 50 ME0000106280100010000 +- 25 ME0000120050100012500 +- 200 Khz @ 12.5 Khz ME0000110280100012500 +- 100 ME0000110280100012500 +- 50 ME0000108280100012500 +- 25 ME0000114050100020000 +- 200 Khz @ 20.0 Khz ME000010A280100020000 +- 100 ME0000106280100020000 +- 50 ME0000104280100020000 +- 25 ME0000110280100025000 +- 200 Khz @ 25.0 Khz ME0000108280100025000 +- 100 ME0000104280100025000 +- 50 ME0000100280100025000 +- 25 ME000010E280100030000 +- 200 Khz @ 30.0 Khz ME0000108280100030000 +- 100 ME0000104280100030000 +- 50 ME0000100280100030000 +- 25 ME0000108280100050000 +- 200 Khz @ 50.0 Khz ME0000104280100050000 +- 100 ME0000100280100050000 +- 50 Note 00 sample size This is invalid! ME0000104280100100000 +- 200 Khz @ 100.0 Khz ME0000100280100100000 +- 100 Invalid ME0000100280100100000 +- 50 Invalid ********************************************************************** The data is returned in 37 byte packets. The packets begin with the Letters NE1 followed by the 2 digit hex packet number. The Packet numbers run from 00 to F0 (must be 2 digits). Typical packet numbers would be NE100, NE170, NE180 and NE1F0. These numbers are followed by 32 bytes that contain signal level information for EACH sample (16 per packet). Each byte is a hex number (in ascii) that can run from 00 to FF. The bytes in packet NE180 represent the first 16 samples UP from the displayed frequency in ascending order. The bytes in packet NE170 represent the 16 samples BELOW the displayed frequency in descending order. For example the following: NE18020202020202020202020202020202020 NE1 80 20202020202020202020202020202020 NE1 is the fixed preamble NE1 80 20202020202020202020202020202020 80 is the packet number NE180 20 202020202020202020202020202020 20 is the sample signal level (20 Hex) at the displayed frequency NE18020 20 2020202020202020202020202020 This is the next sample level UP from the displayed freq The next 14 values represent the next 14 sample levels. If less samples are needed, the higher sample levels are set to 00. If more then 16 sanple levels are needed Up from the center freq, then the next packet NE190 hold the values. For the following: NE17000000000000000001111111111111111 NE1 7000000000000000001111111111111111 NE1 is the fixed preamble NE1 70 00000000000000001111111111111111 70 is the packet number. Packet 70 is the first packet BELOW the center frequency. NE170000000000000000011111111111111 11 11 This is the first sample level BELOW the center frequency. NE1700000000000000000111111111111 11 11 11 This is the next LOWER sample level and so on. In this example, only 16 (10 Hex) samples were specified. 8 samples are provided here below center freq and the corresponding 8 above center freq would be in the NE180 packet. If more then the 32 samples that can be displayed with NE170 and NE180 were specified then additional packets would be sent. For example if 48(decimal) samples were specified then the following packets would be returned: NE160 would have 8 samples (in the UPPER 8) NE170 would have 16 samples NE180 would have 16 samples NE190 would have 8 samples (in the LOWER 8) Note that they are sent in ascending order from NE160 to NE190. A rough indication of the number of packets needed for a given sample size is (Number of samples)/16 plus 1. If the number is ODD then add 1 more packet. Sample in order sent (This is a continous string): NE1600000000000000000000030180FA61F14 NE1701F2B0C0F7E030C2B85088E080F2B4314 NE1801B8E181830085FEC6603083001143003 NE19001030101012701000000000000000000 When Band Scope is first turned ON or is turned OFF, ALL 16 packets are returned with ALL samples set to 00. ___________________________________________________________ The DSP commands below have to be sent as a packet followed by a Cr + Lf sample packet J8001J8101J820FJ8301 | | is always there and never changes J8001J8101J820FJ8301 | | DSP ON J8100 is DSP Off J8001J8101J820FJ8301 | | ANR on and set to max would be J8200 if off J8001J8101J820FJ8301 | | Notch turned ON J8301 turns notch ON With this in mind here is the DSP Command Set: On startup the software sends GD? Returns GD00 if NO DSP installed Returns GD01 if DSP Installed Autoupdate must be ON (send G301 + cr + lf): J8001 Always the same J81xx where xx is 00 if DSP is OFF and 01 if ON J82xx This is the ANR function (Automatic Noise Reduction) xx is 00 if ANR is OFF. If ON, xx varies from 01 to 0F when you turn a knob on the new DSP Popup panel. J83xx is the Automatic Notch filter. xx is 00 if notch is OFF and 01 if ON. The following data is written to the PCR1000.ini file. DSPON with either 0 or 1 for Off/On DSPANF with either 0 or 1 for Off/On DSPNR with either 0 or 1 for Off/On DSPNRLEVEL with value 0 to 15 for Noise Reduction level ---------------------------------------------------------- COUNTRY/REGION Table GE? (Returns contents of Address 7E of the EEPROM) JAPAN 00 USA 01 EUR/AUS 02 FRA 03 DEN 04 CAN 05 GENE1 06 GENE2 07 FCC JPN 08 FCC USA 09 FCC EUR/AUS 0A FCC FRA 0B FCC DEN 0C FCC CAN 0D FCC GENE1 0E FCC GENE2 OF TRACKING FILTER LD820x xx=00 automatic tracking, Range 01 to FF manual setting of filter EEPROM UNLOCKING Don't play with these unless you have a verified backup of your own PCR-1000 EEPROM contents You need to unlock the protection even to READ the EEPROM contents. The Unlock Codes are: GC01 GCF0 Note the response to both the above commands is G001 Read Command: LD0xx? xx= eeprom address 00 to 7F Replies LD0xxyy yy = data in location xx Write Command: LD0xxyy xx = address yy = data to write Replies G000 if OK To put protection back on again turn the PCR-1000 off and on again. Use the software command H100 or the switch. The baud rate will then return to 9600. Average Values Use these if you have a corrupted EEPROM and no backup Crash Pattern This is what the PCR-1000 produces if it crashes and corrupts the EEPROM EEPROM Locations (DATA IN DECIMAL) ADDRESS AVERAGE CRASHED COMMENTS (HEX) (DEC) (DEC) 00 0 0 RESERVED 01 0 0 RESERVED 02 82 82 CHECK PATTERN 03 88 88 CHECK PATTERN 04 99 128 REFERENCE XTAL SHIFT (CENTRE =128) 05 0 0 RESERVED 06 0 0 RESERVED 07 0 0 RESERVED 08 63 0 FM LEVEL S0 REF-VOLT 09 79 48 FM LEVEL S3 REF-VOLT 0A 95 80 FM LEVEL S5 REF-VOLT 0B 117 112 FM LEVEL S7 REF-VOLT 0C 140 144 FM LEVEL S9 REF-VOLT 0D 166 176 FM LEVEL S9+20 REF-VOLT 0E 188 208 FM LEVEL S9+40 REF-VOLT 0F 210 240 FM LEVEL S9+60 REF-VOLT 10 54 0 WFM LEVEL S0 REF-VOLT 11 67 48 WFM LEVEL S3 REF-VOLT 12 80 80 WFM LEVEL S5 REF-VOLT 13 103 112 WFM LEVEL S7 REF-VOLT 14 126 144 WFM LEVEL S9 REF-VOLT 15 152 176 WFM LEVEL S9+20 REF-VOLT 16 177 208 WFM LEVEL S9+40 REF-VOLT 17 199 240 WFM LEVEL S9+60 REF-VOLT 18 21 0 SCOPE LEVEL S0 REF-VOLT 19 39 48 SCOPE LEVEL S3 REF-VOLT 1A 45 80 SCOPE LEVEL S5 REF-VOLT 1B 55 112 SCOPE LEVEL S7 REF-VOLT 1C 57 144 SCOPE LEVEL S9 REF-VOLT 1D 61 176 SCOPE LEVEL S9+20 REF-VOLT 1E 64 208 SCOPE LEVEL S9+40 REF-VOLT 1F 67 240 SCOPE LEVEL S9+60 REF-VOLT 20 21 115 FM CENTERMETER LOW 21 57 46 FM CENTERMETER HIGH 22 115 115 RESERVED 23 146 146 RESERVED 24 11 166 FM NOISESQL THRESHOLD LEVEL 25 11 36 FM NOISESQL TIGHT LEVEL 26 2 0 FM NOISESQL SETTING T2 27 4 0 FM NOISESQL SETTING T3 28 0 0 RESERVED 29 0 0 RESERVED 2A 96 96 CTCSS-DET JUDGEMENT LEVEL (CLOSE) 2B 160 160 CTCSS-DET JUDGEMENT LEVEL (OPEN) 2C 98 144 BPF0 LEVEL S9 REFERENCE 2D 137 144 BPF1 LEVEL S9 REFERENCE 2E 111 144 BPF2 LEVEL S9 REFERENCE 2F 106 144 BPF3 LEVEL S9 REFERENCE 30 125 144 BPF4 LEVEL S9 REFERENCE 50.02MHZ 31 130 144 BPF4 LEVEL S9 REFERENCE 58.28MHZ 32 129 144 BPF4 LEVEL S9 REFERENCE 58.32MHZ 33 135 144 BPF4 LEVEL S9 REFERENCE 88.02MHZ 34 138 144 BPF4 LEVEL S9 REFERENCE 108.28MHZ 35 138 144 BPF4 LEVEL S9 REFERENCE 108.32MHZ 36 141 144 BPF4 LEVEL S9 REFERENCE 130.02MHZ 37 140 144 BPF4 LEVEL S9 REFERENCE 149.98MHZ 38 118 144 BPF5 LEVEL S9 REFERENCE 150.02MHZ 39 122 144 BPF5 LEVEL S9 REFERENCE 183.28MHZ 3A 121 144 BPF5 LEVEL S9 REFERENCE 183.32MHZ 3B 122 144 BPF5 LEVEL S9 REFERENCE 216.02MHZ 3C 119 144 BPF5 LEVEL S9 REFERENCE 265.68MHZ 3D 117 144 BPF5 LEVEL S9 REFERENCE 265.72MHZ 3E 117 144 BPF5 LEVEL S9 REFERENCE 300.02MHZ 3F 110 144 BPF5 LEVEL S9 REFERENCE 349.98HZ 40 124 144 BPF6 LEVEL S9 REFERENCE 350.02HZ 41 123 144 BPF6 LEVEL S9 REFERENCE 383.28MHZ 42 123 144 BPF6 LEVEL S9 REFERENCE 383.32MHZ 43 125 144 BPF6 LEVEL S9 REFERENCE 433.32MHZ 44 123 144 BPF6 LEVEL S9 REFERENCE 483.28MHZ 45 123 144 BPF6 LEVEL S9 REFERENCE 483.32MHZ 46 121 144 BPF6 LEVEL S9 REFERENCE 558.32MHZ 47 119 144 BPF6 LEVEL S9 REFERENCE 633.28MHZ 48 119 144 BPF6 LEVEL S9 REFERENCE 633.32MHZ 49 116 144 BPF6 LEVEL S9 REFERENCE 699.98MHZ 4A 103 144 BPF7 LEVEL S9 REFERENCE 700.02MHZ 4B 107 144 BPF7 LEVEL S9 REFERENCE 750.02MHZ 4C 110 144 BPF7 LEVEL S9 REFERENCE 799.98MHZ 4D 110 144 BPF7 LEVEL S9 REFERENCE 800.02MHZ 4E 120 144 BPF7 LEVEL S9 REFERENCE 916.68MHZ 4F 119 144 BPF7 LEVEL S9 REFERENCE 916.72MHZ 50 123 144 BPF7 LEVEL S9 REFERENCE 1016.68MHZ 51 122 144 BPF7 LEVEL S9 REFERENCE 1016.72MHZ 52 112 144 BPF7 LEVEL S9 REFERENCE 1166.68MHZ 53 111 144 BPF7 LEVEL S9 REFERENCE 1166.72MHZ 54 110 144 BPF7 LEVEL S9 REFERENCE 1299.98MHZ 55 0 0 RESERVED 56 0 0 RESERVED 57 0 0 RESERVED 58 35 128 BPF4 TUNING PEAK-POINT 50.02MHZ 59 35 128 BPF4 TUNING PEAK-POINT 58.28MHZ 5A 117 128 BPF4 TUNING PEAK-POINT 58.32MHZ 5B 110 128 BPF4 TUNING PEAK-POINT 88.02MHZ 5C 114 128 BPF4 TUNING PEAK-POINT 108.28MHZ 5D 188 128 BPF4 TUNING PEAK-POINT 108.32MHZ 5E 191 128 BPF4 TUNING PEAK-POINT 130.02MHZ 5F 204 128 BPF4 TUNING PEAK-POINT 149.98MHZ 60 70 128 BPF5 TUNING PEAK-POINT 150.02MHZ 61 43 128 BPF5 TUNING PEAK-POINT 183.28MHZ 62 118 128 BPF5 TUNING PEAK-POINT 183.32MHZ 63 101 28 BPF5 TUNING PEAK-POINT 216.02MHZ 64 92 128 BPF5 TUNING PEAK-POINT 265.68MHZ 65 180 128 BPF5 TUNING PEAK-POINT 265.72MHZ 66 173 128 BPF5 TUNING PEAK-POINT 300.02MHZ 67 177 128 BPF5 TUNING PEAK-POINT 349.98MHZ 68 46 128 BPF6 TUNING PEAK-POINT 350.02MHZ 69 32 128 BPF6 TUNING PEAK-POINT 383.28MHZ 6A 113 128 BPF6 TUNING PEAK-POINT 383.32MHZ 6B 95 128 BPF6 TUNING PEAK-POINT 433.32MHZ 6C 83 128 BPF6 TUNING PEAK-POINT 483.28MHZ 6D 156 128 BPF6 TUNING PEAK-POINT 483.32MHZ 6E 132 128 BPF6 TUNING PEAK-POINT 558.32MHZ 6F 112 128 BPF6 TUNING PEAK-POINT 633.28MHZ 70 187 128 BPF6 TUNING PEAK-POINT 633.32MHZ 71 185 128 BPF6 TUNING PEAK-POINT 699.98MHZ 72 75 128 BPF7 TUNING PEAK-POINT 700.02MHZ 73 66 128 BPF7 TUNING PEAK-POINT 750.02MHZ 74 57 128 BPF7 TUNING PEAK-POINT 799.98MHZ 75 146 128 BPF7 TUNING PEAK-POINT 800.02MHZ 76 79 128 BPF7 TUNING PEAK-POINT 916.68MHZ 77 160 128 BPF7 TUNING PEAK-POINT 916.72MHZ 78 122 128 BPF7 TUNING PEAK-POINT 1016.68MHZ 79 194 128 BPF7 TUNING PEAK-POINT 1016.72MHZ 7A 127 128 BPF7 TUNING PEAK-POINT 1166.68MHZ 7B 202 128 BPF7 TUNING PEAK-POINT 1166.72MHZ 7C 170 128 BPF7 TUNING PEAK-POINT 1299.98MHZ 7D 0 0 RESERVED 7E * 7 COUNTRY/REGION (*See Table of values) 7F 2 7 RESERVED Unknowns --------- Still looking for the purpose of the following PCR commands:- LE20050 LE20040 Above used by icom in their EEPROM routines in their software for setting up the radio and also some third party software I have seen. Is this understood or is it just being copied? GCD0 GE07 H800 * see below LD840? LD846?LD84A? * see below LD842 * see below LD844 * see belowLD848 LD860 LD862 G4? returns G410 J4A80 If anyone fill in the gaps that would be great!

Update:- Some more info has come in! - Thanks to the guys on the PCR-1000 list.There are some questions about the following commands:

LD840? (always 0)

LD842? (current signal strength)

LD844? (centering info?)

LD846? (usually 0x60)

LD848? (always 0)

LD84A? (old LD842?)

LD84C? (always 0)

LD84E? (always 0)

LD860? (always 0)

LD862? (always 0)

LD864? (always 0)

LD842?returns the current signal strength level, same as for I1?

LD84A?returns the previous signal strength. I believe this is what the radio uses to determine if the signal strength level has changed (as you probably noticed, it only kicks out a new I1xx message in G301 mode when the signal strength changes).

LD844?returns something relevant to frequency. If I set the PCR-1000 to 144.35, NBFM, 6Khz filter, and set my HT for 144.35 Mhz, when I transmit on the HT, this value goes to 0x25. Moving the HT to 144.355 causes the value to increase to a nominal 0x37, and moving the HT to 144.345 causes the value to decrease to a nominal 0x15. Interesting relationship between these values: 0x37 - 0x25 = 0x12, and 0x25 - 0x15 = 0x10. This is 18 decimal and 16 decimal respectively. Two pretty close numbers for shifting +/- 5Khz. I expect this register has something to do with the centering information.

I'm not completely sure about this, but every document except 1 has theauto tracking registermis-coded. It's generally listed as LD8200 to turn off, and LD8201 to set to manual.It's actually LD82000 (note three 0's)to turn off, and can be varied from LD82001 to LD820FF. I don't know exactly what the tracking thingie does, but it has a pronounced affect turning it off or on. -Editor's note this has now been corrected in this document, it is the tracking of the RF stage with frequency I believe.

There's also a mention of H800in the documents. H8 will accept values from 00 to FF, and has an odd effect on the audio. Values greater than or equal to 0x81 cause a very brief (100ms or so) drop out on the audio. Values 0x80 and below don't do this. Interestingly enough, when G301 is in effect, changing H8 causes an H9 message to be output. H9 can be read with the H9? command. I've only seen 0x00, 0x01, and 0x10 be reported back.

The following command sequence seems to have something to do with squelch and signal strength. H800; J4180; H881; H9? (reports H901), J4100. Now the squelch should be open, but isn't. Setting H800 will open the squelch again. Now do H8FF; H9? Audio opens, and H9? reports H910. Curious. All my experimenting is in NBFM mode, so perhaps some of these other registers come into play in other modes.

Something else that's not mentioned in any of the documentation is that when G301 mode is on, commands don't generate a response unless they're interrogative (i.e. GD? or H1?).

GM4JJJ

Amateur Radio

GM4JJJ ICOM IC-PCR1000 Page

Other PCR1000 Links

PCR1000 Command List