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Introduction
1-4
1705A Spectrum Monitor
ELECTRICAL SPECIFICATION
Table 1- 1: Spectrum Display
Characteristic
Performance
Requirements
Supplemental Information
Check
Step
Frequency Range
L --- B a n d
70 MHz
950 to 1800 MHz
45 to 100 MHz
F---type connector
Bnc connector
Frequency Span
L --- B a n d
Full
10 MHz/Divisi on
1 MHz/Division
100 kHz/Divisi on
70
MHz
Full
1 MHz/Division
100 kHz/Divisi on
10 Horiz. Div. Equals:
1000 MHz
100 MHz
10 MHz
1MHz
10 Horiz. Div. Equals:
50 MHz
10 MHz
1MHz
11
5
Span/Div Accuracy Typically 0.5 minor Division.
Brightup offset by 1 Division in FULL
SPAN/DIV should st ill come on screen
in the next magnified position.
4, 5, 10, 11
11
Flatness L---Band ±5 dB.
70 MHz ±2 dB.
± from center (1400 MHz).
± from center (70 MHz).
12,
7
Maximum Si gnal Input L --- B a n d : --- 3 0 d B m ,
75Ω.70MHz:
---20 dBm, 75Ω..
Minimum Signal Input --- 8 0 d B m .
Relative Amplitude Accuracy L---Band (only)
±3 dB/100 MHz.
Typically ±1 dB /100 MHz. 12
Sweep Length
¶12 Divisions all SPANS/DIV settings.
4
Sweep Speed Typically 20 --- 200 ms. 9
Positioning Range
Vert ica l
Horizontal
+ and ---3 Divisions.
+ and ---2 Divisions.
13
Displayed Frequencies in FULL
SPAN/DIV
L---BAND (900 --- 1900 MHz)
70 MHz (45 --- 100 MHz)
Left Grat. Mid Grat. Right Grat.
Edge Li ne Edge
900 1400 1900
45 70 95
11
5
Frequency Readout Center Frequency shown by t ime
sharing graphic readout. Exa ct posi-
tion on the trace of the center frequen-
cy shown by a caret in all spans except
FULL.
11