Tektronix 1705A, Instruction Manual

Page: 24 / 223

Introduction
1705A Spectrum Monitor
1- 5
Table 1- 1: Spectrum Display (Cont.)
Characteristic
Check
Step
Supplemental Information
Performance
Requirements
Frequency Bright Up
Marker Registration
Full Span has bright up and frequency
readout (without cursor). Bright
-
up
area will be on screen in at least the
next narrower span.
5
Readout Accuracy L--- Band ±20 MHz.
70 MHz ±2 MHz Typically ±10 MHz.
Typically ±1 MHz. 11
5
Resolution
6 dB Down
300 kHz
10 kHz
300 kHz ±1 Division at 100 kHz
Span/Div.
<2 minor Divisions at 100 kHz Span/
Div.
6
6
Video Filter
Reduces Video bandwidth to
¶
10 kHz.
8
Low Noise Amplifier/Block Down
Converter dc Supply (LNB Power) +18 Vdc ±5%. 250
mA max. Output through L--- BAND input
connector, switched on and off by
rear
- panel slide switch. LED indicator
on rear panel.
3
2 dB Gain Accuracy
¶
2 dB/Division.
<3 dB/Division at --- 50 dBm. 14
Table 1- 2: CRT Display
Characteristic
Performance
Requirements
Supplemental Information
Check
Step
Crt Viewing Area 80 X 100 mm.
Accelerating Potential 13.75 kV.
Trace Rotation Range Greater than ±1˚
from horizontal. Total adjustment range is typically 8˚.
Graticule Internal 8 X 10 Division spectrum
analyzer graticule with variable SCALE
illumination.
Table 1- 3: Power Source
Characteristic
Performance
Requirements Supplemental Information
Check
Step
Mains Voltage Range 90--- 250 V. Continuous range from 90 to 250 Vac. 2
Mains Frequency Range 48 Hz to 66 Hz.
Power Consumption 35 Watts (120 BTU/HR) maximum.