Table 2-1. Operator's Controls, Indicators, and Connectors (Continued)
Control, Indicator,
Key
or Connector
Function
INT TRIG
Signal from modulation generator starts main generator for one cycle
each time trigger level setting is exceeded.
INT GATE
Internal signal from modulation generator starts main generator each
time trigger level setting is exceeded. Operation continues while inter-
nal signal is high and stops when internal signal falls below trigger level
setting.
MODULATION Switches
Selects type and source of modulation signals.
6
AM
Selects internal or external amplitude modulation.
FM/SWP
Selects internal or external frequency or sweep modulation.
Selects internal or external phase modulation.
PM()
FUNCTION Switch
7
Selects desired modulation generator waveform.
Modulation generator provides sine waveform.
(Sine)
(Triangle)
Modulation generator provides triangle waveform.
Modulation generator provides square waveform.
(Square)
(Positive ramp)
Modulation generator provides sweep voltage starting at a low level
and increasing to a high level.
(Negative ramp)
Modulation generator provides sweep voltage starting at a high level
and decreasing to a low level.
Varies output level of modulation generator.
MOD AMPLITUDE Control
8
FREQ/PERIOD MULT
Selects desired modulation generator operating frequency range.
9
(Hz/s) Switch
Varies frequency of modulation generator within range selected by
VARIABLE Control
10
FREQ/PERIOD MULT (Hz/s) switch.
Indicates that output amplifier limits (into 50 Ω) have been exceeded.
11
OVERLOAD Indicator
ATTENUATION (dB)
Selects desired main generator output level attenuation range.
12
Switch
AMPLITUDE Control
Varies output signal within limits set by ATTENUATION (dB) switch.
13
FUNCTION OUT (50 Ω)
14
Output source of main generator functions.
Connector
2-2