Tektronix TDS 620A - Page 36

Warranted Characteristics
TDS 620A, 640A, & 644A Service Manual
1Ć15
TableĂ1Ć10:ăWarranted Characteristics Ċ Triggering System
Name
Description
Accuracy (Time) for PulseĆGlitch or
PulseĆWidth Triggering
Time Range
2nsto1ms
1.02 msto1s
Accuracy
±(20% × | Setting | + 0.5 ns)
±(100 ns + 0.01% × | Setting | )
Sensitivity, EdgeĆType Trigger, DC
Coupled
1
Trigger Source
Any Channel
Auxiliary
Sensitivity
0.35 division from DC to 50 MHz, increasing to
1Ădivision at 500 MHz
0.25 volts from DC to 50 MHz
Width, Minimum Pulse and Rearm, for
Pulse Triggering
Pulse Class
Glitch
Runt
Width
Minimum
Pulse Width
2ns
2.5 ns
2ns
Minimum Rearm Width
2 ns + 5% of Glitch Width
Setting
2.5 ns
2 ns + 5% of Width Upper Limit
Setting
Jitter (Option 05 Video Trigger) 17 ns
pĆp
on HDTV signal; 60 ns
pĆp
on NTSC or PAL signal
Input Signal Sync Amplitude for
Stable Triggering (Option 05 Video
Trigger)
0.6 division to 4 divisions with (1 to 4 divisions in numeric field)
1 The minimum sensitivity for obtaining a stable trigger. A stable trigger results in a uniform, regular display triggered on the seĆ
lected slope. The trigger point must not switch between opposite slopes on the waveform, and the display must not roll" across
the screen on successive acquisitions. The TRIG'D LED stays constantly lighted when the SEC/DIV setting is 2 ms or faster but
may flash when the SEC/DIV setting is 10 ms or slower.
TableĂ1Ć11:ăWarranted Characteristics Ċ Output Ports, Probe Compensator, and
Power Requirements
Name
Description
Logic Levels, MainĆ and DelayedĆ
Trigger Outputs
Characteristic
Vout (HI)
Vout (LO)
Limits
2.5ĂV open circuit; 1.0 V into a 50ĂW load to
ground
0.7 V into a load of 4mA;0.25 V into a
50ĂW load to ground
Output Voltage and Frequency,
Probe Compensator
Characteristic
Voltage
Frequency
Limits
0.5 V (baseĆtop) ±1% into a load of 50ĂW
1 kHz ±5%
Output Voltage, Signal Out (CH 3
1
) 20ĂmV/division ±20% into a 1ĂMW load; 10 mV/division ±20% into a
50ĂW load
Source Voltage 90 to 250 VAC
RMS
, continuous range
Source Frequency 47 Hz to 63 Hz