HP 8568B, Руководство по испытаниям и регулировке работы, Страница: 227 / 313

Procedure
Second IF Amplifier
Adjustments
16. Second IF Amplifier and Third Converter Adjustment
Adapters:
Type N (f) to (f) . . . . . . . . . . . . . . . . . . . . . . 1250-1745
Type N (m) to BNC (f) required) . . . . . . . . . . . . . 1250-0780
Type N (f) to BNC (f) required) . . . . . . . . . . . . . . 1250-1474
APC 3.5 (f) to APC 3.5 (f) . . . . . . . . . . . . . . . . . . . . . 1250-1749
Cables:
BNC to SMB Snap-On Accessory) (2 required) . 85680-60093
BNC 122 cm (48 in) (3 required) . . . . . . . . . . . . . . . . . .
SMA (m) to (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5061-5458
1.
2.
3.
4.
5.
6.
7.
8.
9.
12.
Position instrument on right side as shown in Figure 3-63, with
bottom cover removed.
Set LINE switch to ON and press
PRESET
]
on
HP HP
HP and HP
Connect 20 Attenuator and power splitter to RF OUTPUT
of synthesized sweeper. Connect one arm of power splitter
to R input of scalar network analyzer through Detector. See
Figure 3-63.
Set synthesized sweeper FREQUENCY MARKERS to 291.4
MHz and to 311.4 MHz.
Press MHz on synthesized sweeper.
Connect Power meter to other power splitter port and set
synthesized sweeper
[
POWER LEVEL
)
for Power Meter indication of
-20.0
Disconnect Power Meter and connect power splitter output to
using adapter and a BNC to SMB test cable. Refer to
Figure 3-64.
Connect to A input of scalar network analyzer, using
adapter and another BNC to SMB test cable.
Connect synthesized sweeper SWEEP OUTPUT (rear panel),
Z-AXIS BLANK/MKRS (rear panel), and PULSE MODULATION
INPUT to proper rear-panel connectors on scalar network
Analyzer, as shown in Figure 3-63.
On the scalar network analyzer, turn Channel 2 off and press
(A/R).
Set scalar network analyzer to 1 and set (RF
LEVEL) to + 14 Set REF POSN (press REF POSN) to the fourth
division from bottom using the data knob.
On synthesized sweeper, press (ON) and
Set to 500 ms.
Adjust 301.4 MHz Filter, through for
the best filter response with a gain of + 14 but
+ 17 See Figure 3-64 for the location of the
adjustments.
Adjustments 13