BG7TBL FA-5-6GP, change gate time over USB?

[KedasProbe]

I bought the FA-5-6GP but no new manual about the needed codes.
This is the small version without buttons and without screen. (only one green led)

I tried changing gate time with $G* representing the button press (from the FA-2 manual)
I get: GATE TIME 0000000100 mS GOK
So that is ok, but if I send/press again I expect it to change.

Any suggestions about how I can change the  gate time?

(or read the power, EDIT: power reading work with $D* for both channels)

Thanks

[KedasProbe]

After some further testing I see that I can't switch to CH2, although it indicated that it does that. 

Commands that give a response
$E3434*   PRECISION MODE ON EOK
$E3535*   PRECSION MODE OFF EOK
$E2020*   SEL TEST MODE EOK
$E2222*   SEL CH2 FREQ EOK stays on CH1 !!, EDIT power cycle needed
$E2121*   SEL CH1 FREQ EOK
$E3030*   SEL CH1 50R EOK
$E3131*   SEL CH1 1MR EOK
$E3636*   LPF ON EOK
$E3737*   LPF OFF EOK
$G*   GATE TIME 0000000100 mS GOK never changes
$R*   RST ROK
$B00960* CHANGE BAUDRATE TO 0000009600 BPS BOK
$B05760* CHANGE BAUDRATE TO 0000057600 BPS BOK
$B11520* reading failed, although it did change it
$D*   $BPIR ,00024000000.13566796,+00093,DOK power reading CH2
$D*   $APIR ,0009999999.999803921,+00128,DOK Ref-out to CH1 50Ω 12.8 dBm
$D*   $A I  ,0019649419.668446932,-00414,DOK Ref-out to CH1 1MΩ
$D*   $A IR ,0000000000.000000000,-00536,DOK CH1 50Ω no signal
$H*   SET MASK_H FREQ 0000005536 MHz HOK

after calibration with GPSDO  (everything with 0.1s gate time since I can't change it)
Calibrated the USB reading, not output ref. since the loop had an offset of 1.1mHz on 10MHz
Count 1014
Average 10000000.00050616968934911243
Peak Peak 0.007041184
Count 292 (later)
Average 9999999.999578076633561643836
Peak Peak 0.006613712

Count 1258
Average 100000.0014598554332273449921
Peak Peak 0.001500004

Count 285
Average 999.9999378147719298245614035
Peak Peak 0.000099010
only two possible numbers, see below  (A stands for Channel A=CH1 and B is for CH2)
$A0000001000.000000000,
$A0000001000.000000000,
$A0000001000.000000000,
$A0000001000.000000000,
$A0000000999.999900990,
$A0000000999.999900990,
$A0000000999.999900990,

Count 219
Average 9.999999771689497716894977169
Peak Peak 5.00E-7
only two possible numbers, see below
$A0000000009.999999500,
$A0000000009.999999500,
$A0000000009.999999500,
$A0000000010.000000000,
$A0000000010.000000000,
$A0000000010.000000000,

Looks like I will need to send it back if I don't find a way to go to CH2 and change gate time....
FA-5 is not working despite the recent 2024-06 date.

edit Timelab files attached, keep in mind the GPSDO is less stable below 10sec hence the drop.
Sending the channel change command (to CH2) and then power cycle seems to work to get CH2
Count 1201  (1GHz on CH2)
Average 1000000001.117715858817651957
Peak Peak 1.27398220

Count 1785 (100MHz on CH2)
Average 100000000.5087346761008403361
Peak Peak 0.29005594

[KedasProbe]

Good news, I got an serial protocol manual from BG7TBL for FA-5.
There are clear differences with the FA-2 but you can always try if it works or not.
(I used chatGPT to translate and format their TXT file to HTML)

Gate time is not limited to 10sec, in theory you can go up to 99.999 sec, nice to know.
I tried 99999 but it returned a wrong reading, so that may not work.

$AXXXXX* - Set Gate Time in ms (Max 99999 ms, not saved after power off)
Example: Send $AXXXXX*, immediately exit measurement, current measurement data invalid.

With $C0000* you can switch to the internal reference instead of adding a cable, nice.
Still with an offset error that changes with gate time it seems.
SEL INT-10M COK
$T0010000000.001900003,

100ms
$A0010000000.001900003,
$A0010000000.000588235,
$A0010000000.000700000,
$A0010000000.001700002,
$A0010000000.001800003,
CHANGE GATE TIME TO 0000001000 mS AOK
$A0009999999.999540000,
$A0009999999.997480006,
$A0009999999.996940009,
$A0009999999.997570005,
$A0009999999.997290007,
$A0009999999.997630005,
$A0009999999.997440006,
CHANGE GATE TIME TO 0000002000 mS AOK  (looks to be the better setting)
$A0009999999.999134134,
$A0010000000.000050050,
$A0010000000.000100000,
$A0010000000.000075075,
$A0010000000.000095000,

You can also set it so it only send data when you ask for it.
(in case you use a terminal instead of a client program for it)

I will give a 'review' later

edit: the GUI is coming along, Python + QT6, my first QT6 program.(started modifying a git example)
edit: Updated protocol file, LPF codes were swapped in their documentation.

P.S. sorry for using the forum as my notebook