Modulators
MODULATOR SPECIFICATIONS (cont’d)
MODEL NUMBER
E7853
SPECIFICATION
E7656
E7854
U.S. Standard
NTSC (PAL M)
3, 4
Transmission System
Color System
Europe Standard
PAL B
U.S. Standard
NTSC
Output Channel
Output Impedance (Ω)
Power Source (VDC)
+B (MOD)
3, 4
3, 4
75, unbalanced
75, unbalanced
75, unbalanced
5
–
5
–
5
–
+B (BST)
Video Characteristics
Input Impedance (kΩ)
Input Signal Level (Vp-p)
Modulation Factor
CH 36
1 ±30%, unbalanced 1 ±30%, unbalanced 1 ±30%, unbalanced
1 synchronous (–)
1 synchronous (–)
1 synchronous (–)
77 ±7%
77 ±7%
77 ±5%
–
–
–
–
–
–
Other Channels
V/S Ratio
7 +0.25, –0
3 +0, –0.25
7 +0.25, –0
3 +0, –0.25
7 +0.25, –0
3 +0, –0.25
Amplitude Frequency Characteristics (dB)
Differential Gain (%)
+2, –3 (maximum)
10 (maximum)
10 (maximum)
–
+2, –3 (maximum)
10 (maximum)
10 (maximum)
–
+2, –3 (maximum)
10 (maximum)
10 (maximum)
–
Differential Phase (°)
CH 36
Other Channels
–
–
–
Change in Modulation Factor to APL (%)
S/N Ratio (dB)
±5 (maximum)
±5 (maximum)
±5 (maximum)
45 (p-p/rms
minimum)
45 (p-p/rms
minimum)
45 (p-p/rms
minimum)
Audio System Characteristics
10 unbalanced
(minimum)
30 unbalanced
(minimum)
30 unbalanced
(minimum)
Input Impedance (kΩ)
Input Signal Level (dBs)
Amplitude Frequency Characteristics (dB)
Modulation Factor
–5
1.24 Vp-p
+2, –3
1.04 Vp-p
+2, –3
+2, –3
100 ±20%
3.0 (maximum)
45 (minimum)
100 ±20%
80 ±16%
Distortion Rate (%)
3.0 (maximum)
45 (minimum)
3.0 (maximum)
45 (minimum)
S/N Ratio (Includes Buzz) (dB)
Output System Characteristics
Video Carrier Frequency (kHz)
Audio Frequency (kHz)
±100 (maximum)
±100 (maximum)
±100 (maximum)
5,500 ±7
4,500 ±7
4,500 ±7
(maximum)
(maximum)
(maximum)
Frequency Float (MHz)
–
–
–
Video Output Level (dBµ)
74 ±3
66 ±3 (maximum)
74 ±3 (maximum)
Audio Output Level Difference (P/S Ratio) (dB)
16 +4, –3
(maximum)
16 +4, –3
(maximum)
16 +4, –3
Output Terminal Spurious (For fp Output Level)
(dB)
Specific Frequency
Other Frequencies
30 (maximum)
30 (maximum)
60 (maximum)
50 (maximum)
Yes/No
30 (maximum)
30 (maximum)
60 (maximum)
50 (maximum)
Yes/Yes
30 (minimum)
30 (minimum)
60 (mnimum)
50 (minimum)
Yes/Yes
Spurious Radiation Within the Band (dB)
Chroma Beat
Antenna In/Tuner Out
Connector Type
IEC/RCA
F/RCA
F/RCA
NOTE:
Blocks with only a dash indicate that data is not applicable.
RF Components
29
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