Microtelecom Perseus User guide

PERSEUS RECEIVER

CAT INTERFACE REFERENCE MANUAL

Microtelecom s.r.l. – Pavia di Udine, Italia

- Revision EN03 -

Default CAT commands

Command

ID

Effect

$00 Transfer frequency

$01 Transfer mode

$03 Read operating frequency

$04 Read mode

$05 Set frequency

$06 Set mode

$11 Read and set attenuator

$15 $01 Read Squelch level

$15 $02 Read S-Meter level

$16 $02 Enable ADC PreAmp and Dither generator

$16 $12 Set AGC

$19 $00 Read default address

Microtelecom extensions

Command

ID

Effect

$70 $00 Get Perseus software version

$70 $01 Set DDC sampling rate

$70 $02 Start recording

$70 $03 Stops recording

$70 $04 Set filter bandwidth

$70 $05 Enable/disable sound output

$70 $06 Set Noise Blanker (On/Off and mode)

$70 $07 Enable/disable Noise Reduction

$70 $08 Enable/disable Auto Notch

$70 $09 Enable/disable CW Peak

$70 $0A Set Volume level

$70 $0B Set Noise Blanker level

$70 $0C Set Noise Reduction level

$70 $0D Set Auto Notch level

$70 $0E Set CW Peak level

$70 $0F Get receiver info

CI-V Commands Parameters

This section is not meant to be a complete CI-V reference, but it simply describes the differences
and customizations available through the Perseus CAT interface.

Mode Setting Commands (CMD $01 and CMD $06)
Commands $01 and $06 will only set the demodulator, ignoring the second parameter (filter width).
The demodulator indexes are listed in the following table.

Mode ID Mode

$00 LSB

$01 USB

$02 AM

$03 CW

$04 RTTY

$05 FM

$06 SAM

$07 CW-R

$08 RTTY-R

$09 DRM

$0A USER (*)

(*) Zero IF, 31.25 kS/s, IQ output on VAC interface

Set Attenuator Command (CMD $11)
The set attenuator command accepts the following values:

Value Effect

$00 Attenuator Off

$10 10 dB Attenuator

$20 20 dB Attenuator

$30 30 dB Attenuator

(empty) Read Attenuator setting

Read S-Meter (CMD $15 $02)
After receiving this command, Perseus will reply with a BCD value in the range 0..255 (thus its
width could be one or two bytes), using the following values as extremes:

Value Meaning

0 -140 dBm

255 +30 dBm

PreAmp ADC and Dither Generator (CMD $16 $02)
This command accepts the following values:

Value

Effect

PreAmp Dither

$00 OFF OFF

$01 ON OFF

$02 OFF ON

$03 ON ON

AGC Setting (CMD $16 $12)
This command accepts the following values:

Value AGC

$00 Disabled

$01 Fast

$02 Medium

$03 Slow

Read Default Address Command (CMD $19 $00)
Perseus replies to this command with its predefined address ($E1). Perseus will reply to any request
(”To address” in the CAT specification) even if the destination addresses don't match.

Get Perseus Software version (CMD $70 $00)
This command returns a string containing the Perseus version in the form (“v4.0b”):

$FE $FE $XX $XX $70 $00 $76 $34 $2E $30 $62 $FD

DDC Sample Rate Setting (CMD $70 $01)
This command accepts the following values:

Value DDC SR

$00 125 kS/s

$01 250 kS/s

$02 500 kS/s

$03 1 MS/s

$04 2 MS/s

Start Recording (CMD $70 $02)
The data field in this command must contain a zero-terminated string containing a full path and file
name to record. If the file cannot be created (e.g. if the path doesn't exist), Perseus will reply with a
NOK. After receiving a “Start Recording” command, some other CAT commands could be ignored
(e.g. if the user requests to tune a frequency outside the recording bandwidth or tries to change ADC
or Attenuators settings). Created files will be segmented as usual, adding the _nnn suffix right
before the .wav extension (where nnn is a progressive number).

End Recording (CMD $70 $03)
This command stops the recording session.

Set Filter Bandwidth (CMD $70 $04)
This command allows setting both the desidered filter button and width. The data field in this
command should be formatted as follows (after the $70 $04 command):

FltIdx Val1 $AA Val2

FltIdx is the button filter index, going from $00 for the 50 kHz button up to $06 for the 0.8 kHz
button. $AA is the delimiter between Val1 and Val2 (BCD format). The meaning of Val1 and Val2 is
different if using USB/LSB or the other modes. During SSB operation, the values represent the
lower and higher edges of the filter (e.g. 300 and 2700) measured in Hz. Using all the other
demodulators, Val1 will be considered as a filter width and Val2 will be used as frequency offset
from the center. In non-SSB modes, a negative value can be used as offset, specifying 0xD as most
significant nibble. For example, in AM mode, the command to send for a 1 kHz wide filter, centered
at -300 Hz is:

$FE $FE $XX $XX $70 $04 $04 $00 $10 $AA $00 $D3 $FD

Set Sound Output (CMD $70 $05)
This command controls the sound output (enable/disable).

Value Effect

$00 Disable

$01 Enable

Set Noise Blanker (CMD $70 $06)
This command controls the Noise Blanker functionality, as shown in the following table.

Value Effect

$00 Disabled

$01 Wide

$02 Narrow

$03 Vectorial

Set Noise Reduction (CMD $70 $07)
This command controls the Noise Reduction function (enable/disable).

Value Effect

$00 Disable

$01 Enable

Set Auto Notch (CMD $70 $08)
This command controls the Auto Notch Filter (enable/disable).

Value Effect

$00 Disable

$01 Enable

Set CW Peak (CMD $70 $09)
This command controls the CW Peak Filter (enable/disable).

Value Effect

$00 Disable

$01 Enable

Set Volume Level (CMD $70 $0A)
This command sets the audio output level. Accepted range is 0..255 on a single byte (not BCD).

Set Noise Blanker Level (CMD $70 $0B)
This command sets the Noise Blanker value. Accepted range is 0..255 on a single byte (not BCD).

Set Noise Reduction Level (CMD $<70 $0C)
This command sets the Noise Reduction level. Accepted range is 0..255 on a single byte (not BCD).

Set Auto Notch Threshold (CMD $70 $0D)
This command sets the Auto Notch filter threshold. Accepted range is 0..255 on a single byte (not
BCD).

Set CW Peak Threshold (CMD $70 $0E)
This command sets the CW Peak filter threshold. Accepted range is 0..255 on a single byte (not
BCD).

Get Receiver Information (CMD $70 $0F)
This command requests receiver serial number and software version. The reply is in the following
format:

$FE $FE $XX $XX $70 $0F String1 $7C String2 $7C String3 $FD

where String1 is the Perseus executable software version, String2 is the DLL version and String3 is
the full receiver ID (the first 5 digits are the receiver serial number). The strings are divided by a
$7C (“|”, vertical bar).

30 November 2012

© 2007-2013 Microtelecom s.r.l. - Pavia di Udine, Italia – All rights reserved.