Communication From Pc To Hm5012-2/5014-2; Parameter Query (List Od Commands) - Hameg Instruments Hm5012-2 Handbuch

Commands from PC to HM5012-2/5014-2
General description: Each query/command must be introduced
with „#" [23 hex = 35 dec] followed by respective characters,
i.e. TG for Tracking Generator, and further followed by
parameter, which are explained in detail below. Each command
is executed by pushing the „Enter" key (hex: 0x0d). No
differentiation is made between capital and lowercase letters
(i.e. TG = tg). Units of measurement are always definite (i.e.
span value given in MHz) and are therefore not indicated.
Setting Commands:
((E) stands for keyboard Enter (CR, Carriage Return) pushbutton
#kl0(E) = Key-Lock off
#kl1(E) = Key-Lock on (RM (Remote) -LED is lit)
The following commands are executed only if „kl1" has been
sent before, so that REMOTE is on.
#tg0(E) = tracking generator off
#tg1(E) = tracking generator on
#vf0(E) = video filter off
#vf1(E) = video filter on
#tl+01.0(E) = (maximum) tracking generator level of
+1.0 dB (selectable in 0.2 dB steps) up to a
minimum of
#tl-50.0(E) = -50.0 dB
#rl-30.0(E) = reference level of -30.0 dBm up to
#rl-99.6(E) = -99.6 dBm, selectable in 0.2dB steps
#at0(E) = attenuator 0 (10, 20, 30, 40) dB
#bw1000(E) = bandwidth 1000 (120, 9) kHz
#sp1000(E) = Span 1000 MHz, selectable between
1000MHz and 1MHz in 1-2-5 sequence
#sp0(E) = zero span
#db5(E) = 5 dB/Div. scaling
#db10(E) = 10 dB/Div. scaling
#cf0500.000(E) = center frequency in xxxx.xxx MHz
#dm0(E) = detect mode off (average, max. hld)
#dm1(E) = detect mode on (average, max. hld)
#sa(E) = stores signal A in memory B
#vm0(E) = display signal A
#vm1(E) = display signal B (stored signal)
#vm2(E) = display A – B (A (actual) minus B
(stored signal))
#vm3(E) = display average mode detected signal
#vm4(E) = display max. hold mode detected signal
#br4800(E) = baud rate 4800 (9600, 38400, 115200) Baud
#bm1(E) = signal data transfer in 2048 byte block,
2001 signal byte, 3 check sum byte and
hex: 0x0d
#rc0(E) = recall (0 to 9) saved instrument settings
#sv0(E) = save (0 to 9) instrument settings
Special commands for emc measurement (only possible in
combination with zero span):
#es0(E) = „1 second measurement" off
#es1(E) = prepares for a „1 second measurement"
(1second measuring time; zero span
activated and suitable resolution bandwidth
selected)
Subject to change without notice
Commands from PC to HM5012-2/5014-2
#ss1(E) = starts a „1 second measurement" at current
center frequency and transfers data of the
previous measurement.
Note:
After a command has been received and executed the
spectrum analyser returns „RD" (CR).
Example (emc measurement):
#es1(CR) (prepares for „1 second measurement),
#cfxxxx.xxx(CR), #ss1(CR) (1. measurement, data invalid),
#cfxxxx.xxx(CR), #ss1(CR) (2. measurement, transfer of 1.
measurement data), #cfxxxx.xxx(CR), #ss1(CR), .... , #es0(CR)
(1 second measurement off).
Parameter Query (list of query commands):
The following queries are always answered even if the
instrument is not in remote condition (Remote Off; KL0).
Syntax:
#xx(E) = transfer parameter (xx = tg, tl, rl, vf, at, bw,
sp, cf, db, kl, hm, vn, vm, dm, uc)
Note:
With the exception of
#hm(E) = query for instrument type
#vn(E) = query for firmware version
#uc(E) = query for measurement condition
(uncalibrated, calibrated)
the other commands have been listed under „Setting
Commands".
1. Example:
„#uc(E) (uncalibrated)": PC transmits #uc(CR). Instrument reply:
UC0(CR) (calibrated) or UC1(CR) (uncalibrated)
2. Example:
„#tl(E)", PC query for tracking generator level: PC transmits
#tl(CR). Instrument reply: e.g. TL-12.4 (CR)
3. Example:
„#vn(E)", PC query for firmware version: PC transmits #vn(CR).
Instrument reply: x.xx(CR) (e.g. x.xx = 1.23)
4. Example:
„#hm(E)", PC query for instrument type: PC transmits #hm(CR).
Instrument replies with:
5014-2 (CR) or 5012-2
5. Example: PC transmits a command sequence to the
analyzer:
#kl1(E) = switch „Remote" on
#cf0752.000(E)= sets center frequency to 752MHz
#sp2(E) = sets a span of 2MHz
#bw120(E) = selects a resolution bandwidth of 120kHz
#kl0(E) = switches from remote to manual operation
Commands #tg and #tl are not contained in HM5012-2
instruction set.
Unknown or unrecognised commands do not cause a
response to the PC.
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