f. Set sweep oscillator LINE switch to RF and
2-4 GHz.
allow a 15-minute warmup.
(7) Replace attenuator (1-4) with attenua-
7-3. Output Power and Flatness
tor (1-5).
a. Performance Check.
(8) Slowly turn sweep oscillator START/
CW control from 2.0 to 4.0 GHz. Record power
(1) Connect equipment as shown in figure
meter minimum and maximum indications.
(9) Minimum power meter indication is
greater than -12 dbm. Maximum indication does
lows:
not exceed minimum by more than 14 db.
(a) SWEEP SELECTOR switch to CW.
(b) ALC pushbutton released.
b. Adjustments.
(c) FUNCTION START STOP push-
(1) Repeat performance check steps (1)
button pressed.
through (3).
(d) All AMPLITUDE MOD pushbuttons
released.
(2) Adjust sweep oscillator START/CW con-
trol for minimum indication on power meter.
(3) Position UUT controls as follows:
( 3 ) Adjust UUT POWER ADJ AlR40
(b) POWER LEVEL control fully clock-
wise.
7-4. Frequency Range and Accuracy Check
(4) Slowly turn sweep oscillator START/
CW control from 0.1 to 2.0 GHz. Record power
a. Performance Check.
meter minimum and maximum indications.
(1) Connect equipment as shown in figure
(5) Minimum power meter indication is
greater than -7 dbm. Maximum indication does
not exceed minimum by more than 14 db.
lows:
(a) SWEEP SELECTOR switch to CW.
(b) FUNCTION START STOP pushbut-
ton pressed.
(C) All AMPLITUDE MOD pushbuttons
released.
(d) ALC pushbutton released.
(3) Turn UUT POWER LEVEL control
fully clockwise.
(4) Turn sweep oscillator START/CW con-
trol to settings listed in table 7-2. Set UUT fre-
quency range switch as listed. Electronic counter
(1-7) indicates within specified limits.
b. Adjustments.
(1) Connect equipment as shown in figure
7-3.
(2) Connect multimeter (1-8) between UUT
assembly ( 1-9).
4 GHz.
(4) Adjust sweep oscillator START CW
(5) Adjust UUT 2.0 GHz ADJ AIR28 (fig.
7-2) for electronic counter indication of
1.997
GHz.
(6) Adjust sweep oscillator START CW
42