Rear Panel Power Supplies; Rear Panel Address Mapping - Fluke 5700A Series Service Manual

2-205. Rear Panel Power Supplies

Power supplies are divided into guarded and unguarded. Unguarded supplies +5V
LOGIC, +12V, and -12V are referenced to +5V LOGIC COMMON and are generated on
the Digital Power Supply assembly (A19). Guarded supplies +5LH and -5LH are
referenced to LH COM, and the supply +5RLH is referenced to RLH COM. These
supplies are generated on the Regulator/Guard Crossing assembly (A17). Some ICs on
the A17 assembly do not have power and ground pins shown on the schematic. This
information is included in the table on sheet 1 of the Rear Panel schematic.
Calibrator Output
Frequency at
TP16
10 Hz to 12 Hz
13 Hz to 15 Hz
16 Hz to 30 Hz
31 Hz to 60 Hz
61 Hz to 120 Hz
130 Hz to 150 Hz
160 Hz to 300 Hz
310 Hz to 600 Hz
610 Hz to 1.2 kHz
1.3 kHz to 1.5 kHz
1.6 kHz to 3.0 kHz
3.1 kHz to 6.0 kHz
6.1 kHz to 12 kHz
13 kHz to 15 kHz
16 kHz to 30 kHz
31 kHz to 60 kHz
61 kHz to 120 kHz
130 kHz to 150
kHz
160 kHz to 300
kHz
310 kHz to 600
kHz
610 kHz to 1.2
MHz

2-206. Rear Panel Address Mapping

The rear panel decodes address lines from the bus connected to the main CPU through
connector P91. Decoding is accomplished with a C22V10 PLD (U8) with the following
chip selects:
•
RPDUARTCS*, D00000-D0001F
•
RPIEEECS*, D00020-D0002F
•
Y52XXRD*, D00030-D00031
•
Y5205WR*, D00032-D00033
•
Y5220WR*, D00034-D00035
Table 2-16. Divider Settings and VCO Frequencies
U17 R Divider U17 N Divider
Setting Setting
500 1000
400 1000
200 1000
100 1000
50 1000
400 100
200 100
100 100
50 100
400
200
100
50
400
200
100
50
40
20
10
5
Analog Section Detailed Circuit Description
Total Division
of VCO at
TP13
1M
800k
400k
200k
100k
80k
40k
20k
10k
10 8k
10 4k
10 2k
10 1k
0 800
0 400
0 200
0 100
0 80
0 40
0 20
0 10
Theory of Operation
VCO Frequency
at TP13
10 MHz to 12 MHz
10.4 MHz to 12 MHz
6.4 MHz to 12 MHz
6.2 MHz to 12 MHz
6.1 MHz to 12 MHz
10.4 MHz to 12 MHz
6.4 MHz to 12 MHz
6.2 MHz to 12 MHz
6.1 MHz to 12 MHz
10.4 MHz to 12 MHz
6.4 MHz to 12 MHz
6.2 MHz to 12 MHz
6.1 MHz to 12 MHz
10.4 MHz to 12 MHz
6.4 MHz to 12 MHz
6.2 MHz to 12 MHz
6.1 MHz to 12 MHz
10.4 MHz to 12 MHz
6.4 MHz to 12 MHz
6.2 MHz to 12 MHz
6.1 MHz to 12 MHz
2
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