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Schematic Notes
Model 11848A
Switches on tlhe Block Diagram are shown in
their HP-IB preset state. At Interface turn-on
with no controller connected, the power-up state
is the same as the HP-IB preset state except:
a. ATTEN 1 is set to an open-circuit
(non-programmable) state, and
b. the switches of cluster S5 through S8 are
all open.
2. The transfer function of GAIN 2 also has a
lead-lag response as follows:
33.5
kHz
6
dB
67
kHz
3. The transfer function of Lag-Lead Network 1 is
as follows:
67
kHz
26
dB
4. Assemblies A6, A8, and A9 are controlled as
follows:
Control Line
L17
L18
L17, L18
State
A6
Off
Off
On
A8
On
On
Off
A9
On
Off
Off
5. The transfer functions of Lag-Lead Network 2
on A4 and the Lag-Lead Network on A3 are
both as follows:
3.35
kHz
20 dB
i
3.35
kHz
33.5
kHz
To this transfer function is added a
programmable lag-lead with the following poles
and zeros:
Lag-Lead
Number
0
1
2
3
4
5
6
7
Pole
Frequency
4.82 Hz
8.01 Hz
9.17 Hz
9.68 Hz
9.95 Hz
9.95 Hz
9.95 Hz
9.95 Hz
Zero
Frequency
9.95 Hz
40.1 Hz
115.9 Hz
306 Hz
784 Hz
1.985 kHz
5.00 kHz
12.58 kHz
Attenuation
6 d B
14 dB
22 dB
30 dB
38 dB
46 dB
j
54 dB
62 dB
The passband gain of the High-Pass Filters is 2
(as measured from TP17 to the respective filter
output). The gain settings of the GAIN 3
amplifier and attenuator include the passband
gain of the High-Pass Filters.
Block
D i a g r a m
Notes
90
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