Tabor 8020, Руководство пользователя

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offset, pulse width (model 8021), carrier level, sweep
stop frequency, sweep time / trigger period or the
sweep marker frequency. The display mode may be
programmed by sending one of the following com-
mands:
VFRQ = Frequency
VAMP = Amplitude
VOFS = Offset
VWID = Pulse Width (model 8021)
VCAR = Carrier Level (model 8022)
VSTP = Sweep Stop Frequency
VSWT = Sweep Time
VMRK = Sweep Marker Frequency
VRPT = Internal Trigger Period
4-10-2. Operating Mode (V, P, A, O)
This command gives the user control over the op-
erating mode of the instrument. The operating mode
may be programmed by sending one of the following
commands:
V0 = VCO Mode Off
V1 = VCO Mode On
P0 = Pulse Mode Off (model 8021)
P1 = Pulse Mode On (model 8021)
A0 = Amplitude Modulation Mode Off (model 8022
only)
A1 = Amplitude Modulation Mode On (model 8022
only)
O0 = Offset Mode Off
O1 = Offset Mode On
4-10-3. Trigger Mode (G, T)
The trigger mode command gives the user control
over the operating mode of the Model 8020. There
are a number of acceptable external sources for
stimulating the function generator. The instrument
may also be set to operate in continuous mode or
with having an internal stimulant. The generator
may be programmed to accept either an external
stimulant or an internal stimulant. Program the Model
8020 to one of the trigger modes by sending one
of the following commands:
G0 = Gated Mode Off
G1 = Gated Mode On
T0 = Triggered Mode Off
T1 = Triggered Mode On - External Trigger
T2 = Triggered Mode On - Internal Trigger
4-10-4. Output Mode (C, B)
The output mode command places the function gen-
erator in stand by mode. In model 8021 this command
places the output in pulse complement mode and
in inverted ramp mode. The output mode may be
programmed by sending one of the following com-
mands
C0 = Pulse Complement Off; Ramp Down Off (model
8021)
C1 = Pulse Complement On; Ramp Down On (model
8021)
B0 = Output Stand-By Off
B1 = Output Stand-By On
4-10-5. Waveform (U)
The waveform command give the user control over
the output waveform. The six parameters which are
associated with the waveform commands, set the
instrument to output sinewave, triangle, squarewave,
positive pulse, negative pulse, or DC. The waveform
may be programmed by sending one of the following
commands:
U0 = Sine
U1 = Triangle
U2 = Rectangular
U3 = Positive Pulse
U4 = Negative Pulse
U5 = DC; Ramp Up (model 8021)
4-10-6. Parameter Programming
The parameter programming command sets the func-
tion generator to the various levels which are required
for the unit under test. There are 10 different pa-
rameters which may be modified using this command.
The command message unit is comprised of three
parts: the <command program header>, the <decimal
numeric program data>, the <suffix program data>
(optional), and the <program message terminator>.
The <command program header> mnemonic is in-
dependent of control location on the front panel but
relates to front panel nomenclature. For example,
FRQ mnemonic is related to front panel Frequency
marking.
The <decimal numeric program data> is a flexible
version of numeric representation denoted by NRf.
Operator may choose to program <decimal numeric
program data> using NR1, NR2, or NR3 formats.
IEEE-488.2 Operation Model 8020
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