OPERATION MANUAL
IFF-701Ti
1-2-2
Page 6
Jul 1/00
ITEM DESCRIPTION
10. VAR FREQ Controls
Coarse and fine controls manually
channel sweep the internal Signal
Generator frequency when the
FREQUENCY MODE Switch is in a
VAR position. Clockwise rotation
increases the frequency.
11. TUNE Indicator
Indicates a tuned Signal Generator.
The TUNE Indicator stops illuminating
when the Signal Generator is within
the fine tune range.
12. TUNE Control
NOTE: For maximum accuracy, the TUNE
Control should be adjusted prior to
any receiver tests.
Adjusts the Signal Generator for
optimum tuning. The TUNE Control
requires readjustment when:
● Selecting a different frequency
band with the FREQUENCY MODE
Switch.
● Adjusting VAR FREQ Controls to
change frequency more than a few
MHz in any one band.
● Setting or changing the OUTPUT
ATTENUATOR Control.
ITEM DESCRIPTION
13. OUTPUT ATTENUATOR Control
Adjusts the Signal Generator output
level at the RF OUT Connector into a
50
Ω load. The attenuator dial is
calibrated in -dBm (dB below 1 mW).
The dial is accurate below -30 dBm.
Another chart (also included with the
Test Set) converts -dBm to soft
µV.
NOTE: Soft
µV are µV measured with
50
Ω loading. Hard µV are µV
measured through a 6 dB
attenuator, into a 50
Ω load.
14. FINE TUNE Switch
This switch fine tunes the Signal
Generator output when the TUNE
Indicator stops illuminating (signal
within tune range). With the FINE
TUNE Switch pressed, the TUNE
Control tunes the signal for minimum
deflection from 0 (zero) on the
MONITOR Meter.
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