Tektronix TLA Series, Service Manual

Page: 24 / 130

Specifications
1- 4
TLA Series Digitizing Oscilloscope Modules Service Manual
Table 1- 2: Signal acquisition system (Cont.)
Characteristic Description
Input Impedance, DC--1 M
Ω
Coupled 1 M
Ω ±
0.5% in parallel with 10 pF
±
3 pF
Input Impedance Selections
1 M
Ω
or 50
Ω
Input Resistance, DC--50
Ω
Coupled
50
Ω ±
1%
Input VSWR, DC--50
Ω
Coupled
≤
1.3:1 from DC -- 500 MHz,
≤
1.5:1 from 500 MHz -- 1 GHz
Input Voltage, Maximum, DC--1 M
Ω
, AC--1 M
Ω
,
or GND Coupled
300 V
RMS
but no greater than
±
420 V peak, Installation category II, derated at
20 dB/decade above 1 MHz
Input Voltage, Maximum, DC--50
Ω
or AC--50
Ω
Coupled
5 V
RMS
, with peaks
≤ ±
25 V
Lower Frequency Limit, AC Coupled, typical
≤
10 Hz when AC--1 M
Ω
Coupled;
≤
200 kHz when AC--50
Ω
Coupled
5
n
Random Noise Bandwidth Selection RMS Noise
Full
≤
(350 V + 0.5% of the full scale Setting)
250 MHz
≤
(165 V + 0.5% of the full scale Setting)
20 MHz
≤
(75 V + 0.5% of the full scale Setting)
Range, Internal Offset Full Scale Range Setting Offset Range
10 mV -- 1 V
1.01 V -- 10 V
10.1 V -- 100 V
±
1 V
±
10 V
±
100 V
Range, Sensitivity (Full Scale Range),
All Channels 10 mV to 100 V
6
Step Response Settling Errors, typical
7
The maximum absolute difference between the
value at the end of a specified time interval after
Full Scale Range
Setting
±
Step Response
Maximum Settling
Error (%) at
20 ns
100 ns 20 ms
value at the end of a specified time interval after
the mid-level crossing of the step, and the value
one second after the mid-level crossing of the
step, expressed as a percentage of the step
amplitude. See IEEE std. 1057, Section 4.8.1,
Settling Time Parameters .
10 mV -- 1 V
1.01 V -- 10 V
10.1 V -- 100 V
≤
2 V
≤
20 V
≤
200 V
0.5% 0.2% 0.1%
1.0% 0.5% 0.2%
1.0% 0.5% 0.2%
5
The AC Coupled Lower Frequency Limits are reduced by a factor of 10 when 10X passive probes are used.
6
The sensitivity ranges from 10 mV to 100 V full scale in a 1- 2- 5 sequence of coarse settings. Between coarse settings,
you can adjust the sensitivity with a resolution equal to 1% of the more sensitive coarse setting. For example, between
the 500 mV and 1 V ranges, the sensitivity can be set with 5 mV resolution.
7
The Full Bandwidth settling errors are typically less than the percentages from the table.