4-6.
EXTERNAL LEVELING (Cont’d)
Equipment
Digital Voltmeter
(DVM)
HP
3456A
Crystal Detector
HP 8473C
Capacitor (1000 pF)
HP P/N 0160-4574
Adapters
APC 3.5 (f) to APC 3.5 (f)
HP P/N 5061 -5311
(1
required if DUT is
HP 83408)
TYPE N
(in)
to APC 3.5
(f)
HP P/N 1250-1 744
(1
required if DUT
is
HP 83418)
BNC (f)
to Dual Banana
HP P/N 1251 -2277
BNC
Tee
(in)
(f)
(f)
HP P/N 1250-0781
Attenuators (required for Option 001 or Option 005 only)
10dB
HP8493COpt.010
20 dB
HP 8493C Opt. 020
Procedure
1. Turn DUTs LINE switch ON.
Press [INSTRPRESET] [CW][4]
[.]
[5] [GHz][POWERLEVEL] [0]
[dB(m)].
2. Connect equipment as shown in Figure 4-6 (note 1000 pF capacitor shunting DVM input). Allow
the equipment to warm up for one hour.
NOTE
In step 3, XTAL mode is selected. In this mode the [dB(m)]terminator
key selects dBV. The dBV value selected corresponds to a voltage at
which the DUT’s EXT INPUT will be leveled (see Table 4-14). The
selected dBV is displayed in the ENTRY DISPLAY.
NOTE
If a positive polarity crystal detector is being used for this test, the volt-
ages given in Tables 4-12, 4-13, 4-14, and 4-15 will all be positive.
3. Press
[XTAL][6] [dB(m)].DVM reading should be within the values shown on the first line in
Table 4-12.
Table 4-12.
External Leveling Limits (With No Attenuator)
dBV
Selected
DVM Indication (V)
Lower Limit
Ideal
Upper Limit
±6
0
—10
—20
—1.883
—0.944
—0.2983
—0.0942
—1.995
—1.000
—0.3162
—0.01000
—2.114
—1.059
—0.3352
—0.1061
4-34
Performance Tests
HP 8340B/41B