Tektronix TG8000 User Manual

Operating basics
All of the input
signals are active low. When the signal level(s) for the specified
pin(s) goes from High to Low, the corresponding preset is recalled. For example,
when the signal level for pin 3 goes from High to Low, preset 1 is recalled.
NOTE. Since the signal transition cannot be detected on the edge of the signal, the
signal level needs to be held low for about 0.5 seconds before the preset signal is
recognized. The time required to change the instrument settings depends on the
contents of
the selected preset.
Outputting an alarm signal
The TG8000 can output a n alarm signal from pin 6 on the GPI port connector
when an in
ternal error occurs. Since the output signal is an active low; the signal
levelforpin6goesfromHightoLowwhenanyerrorsoccur.
In addit
ion, you can specify a BLACK output on the AGL7 module as an alarm
output. When an enabled AGL7 alarm occurs, the output signal from the selected
connector turns off for about 60 ms.
NOTE. The AGL7 hardware must be at Version 3.x or above to support outputting
an alarm signal.
The alarm signal is output when one of the following internal errors occurs:
The fan stops working (GPI alarm only).
NOTE. The following genlock alarms are available only when an AGL7 or GPS7
module is installed.
Ag
enlock signal is not connected.
The TG8000 does not lock to a genlock signal.
The frequency of the genlock signal and the internal reference shift
considerably, and the TG8000 is near loss of lock. The threshold for near loss
o
f lock is approximately 2 × 10
-6
from the ends of the tune range.
TG8000 Multiformat Test Signal Generator User Manual 2–51

Tektronix TG8000 Specifications

General

Brand	Tektronix
Model	TG8000
Category	Portable Generator
Language	English