Tektronix TLA7XM, Руководство пользователя

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Operating Information
2- 6
TLA721 Benchtop & TLA7XM Expansion Mainframe Service Manual
Table 2- 1: Passive monitor connector pinouts
Pin Function Description
1 +5 VM +5 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
2 --12 VM --12 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
3 --24 VM --24 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
4 --2 VM --2 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
5 ON/ST Remote On/Standby Power Switch.
1
6 +5 VC +5 V output for charging batteries, running external TTL circuitry,
1 A maximum
7 +12 VC +12 V output for charging batteries, running external TTL circuitry,
1 A maximum
8 +5 VB Input for +5 V standby voltage (for example, from an external
battery). Maximum of 1 A total (pins 8 and 21 combined)
2
9 GND Logic Ground
10 SYSRESET* Backplane SYSRESET* signal (input or output). If you use this pin,
do not violate VXIbus electrical specifications (keep the extender
cable as short as possible).
11
∆
T An analog output signal proportional to the maximum temperature
rise of the 13 modules (100 mV/
°
C) 0V=0
°
C
12 TACH1 A square wave output signal whose period is proportional to the
speed of fan number 1
13 TACH2 A square wave output signal whose period is proportional to the
speed of fan number 2 when a second fan is used. In the current
mainframe only a single fan is used.
14 +12 VM +12 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
15 +24 VM +24 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
16 --5.2 VM --5.2 V for voltage monitoring
To monitor, only use a probe with greater than 1 M
Ω
impedance.
17 GND Logic Ground
18 GND Logic Ground
19 GND Logic Ground
20 GND Logic Ground