Description
GTM-860 is a SAW filtered high quality low cost TV RF modulator that designed for small CATV/MATV system. To ensure ultimate accuracy and stability, both picture carriers and sound carrier are PLL controlled. The GTM-860 is a high performance and provides 55dBmV minimum output level from 54 to 860MHz. It uses high quality SAW filter to achieve optimum VSB and harmonics suppression, which permits its use in adjacent channel systems.
Features
+55 dBmV RF Output
Both Visual and Aural Carriers are PLL Synthesized
C/L Delay is precisely corrected to FCC standard
SAW Vestigial Sideband Filter Assure Ultimate Performance
Comply with Safety Regulation
BTSC Stereo Ready
Specification
RF OUTPUT SECTION |
|
Frequency Range |
54 MHz to 860 MHz appointed |
|
RF Output Level |
+55dBmV |
|
Output Level Control Range |
-20 dB Continuously Adjustable |
|
Spurious Products @55dbmV |
< -60 dB |
|
Frequency Stability |
±10 KHz, (±5 KHz in aeronautical band). |
VIDEO SECTION |
|
Input Type |
Negative Sync. Composite Baseband Video |
|
Input Level |
0.5 Vp-p to 1.5 Vp-p for 87.5% modulation |
|
Input Impedance |
75Ω, unbalance |
|
Frequency Response |
±1.5 dB (30Hz to 4.2MHz) |
|
Signal to Noise Ratio |
≧60 dB (CCIR weighted) |
|
Visual C/N |
>64dB @ 4 MHz BW |
AUDIO SECTION |
|
Input Level |
0.5Vp-p for 25 kHz peak deviation |
|
Input Impedance |
600Ωunbalanced / 10KΩ balanced |
|
Pre-emphasis |
75μS ( 50μS for PAL ) |
|
Frequency Response |
0.75 dB |
|
Total Harmonic Distortion |
≦1.0% |
GENERAL SECTION |
|
Input Voltage |
117, ±10% VAC 60Hz (220V AC 50Hz for PAL) |
|
Dimensions |
19”x1.75”x4.5” |
All specifications are subject to change without notice 
