General Dynamics R2600 Series, Operator'S Manual, Page: 275 / 402

Mon Gen
This field actually contains two separate
fields, one for monitor input attenuation and
one for monitor port selection. Refer to the
Monitor mode description for further details. This field actually contains two separate fields,
one for generate output level and one for gener-
ate output port selection. Refer to the Generate
mode description for further details.
Figure 17-13. Duplex Mode - Display Zone
17-9 ASTRO AUDIO/MODULATION
CONTROL
The Audio Zone located at the lower right of the
screen (figure 17-14) is used to control the
multi-purpose audio synthesizer section of the
unit. Signals generated by the audio synthesizer
are coupled internally to the generator
modulation input as well as to the MOD OUT
connector on front panel. The main categories of
modulation in ASTRO mode are Voice Frame
and Bit Error Rate (BER). Many of the features
available in standard mode are not available in
ASTRO mode. The Audio Zone has been
changed accordingly to simplify testing of
ASTRO radios and equipment.
Each modulation signal has a cursor field for
entering its desired level. Use the keypad or
TUNING knob to enter the desired level.
An additional cursor field, adjacent to each level
entry, is used to switch each selection on and off
using softkeys. This field is located at the
extreme right side of the zone. There are two
possible conditions for this softkey selection.
229