Holland Electronics HMMS-34 Manual


Læs nedenfor 📖 manual på dansk for Holland Electronics HMMS-34 (2 sider) i kategorien Ikke kategoriseret. Denne guide var nyttig for 8 personer og blev bedømt med 4.5 stjerner i gennemsnit af 2 brugere

Side 1/2
HMMS
Fixed Channel SAW Filtered Modulator
HMMS SPECIFICATIONS:
RF Output Channels CATV 2-117, UHF 14-59
Output Level 45dBmv (min)
Range: 12Db (adj)
A/V carrier ratio -9 to -20dB
Visual Carrier Stability ±5KHz
Aural Carrier Offset ±4.5MHz
Aural Carrier Stability ±1 KHz
Spurious Outputs(dBc) -62 dBc
C/N Ratio (in-band) -62 dBc
Broadband Noise(dBc) -95
Visual
Min Video Input .5Vp-p
Frequency Response ±1dB (50Hz to 4.2 MHz)
Video S/N 60dB
Hum Ratio -60dB
Differential Gain 3%
Differential Phase 2 degree
Group Delay 75nsec
AURAL
Input Requirements 200MV (25khz dev)
Input Impedance 10Kohm
Frequency Response ±1 dB: 50Hz-15Khz:
Distortion (THD) 1%
Pre-Emphasis 75usec
Installation Instructions:
1. Slide the model HMMS unit into the HMR rack
2. Power up the modulator by connecting the 3 pin power plug from the HMPS to power
jack in the rear of the HMMS.
3. Allow the HMMS to warm up for at least 30 minutes
4. Connect a spectrum analyzer or field strength meter to the modulator RF OUT port
5. Turn the RF output adjustment on the front of the modulator to get desired output level
6. Turn the A/V adjustment to set the audio carrier 12 to 17 dB below the video carrier
7. Remove analyzer or field strength meter from the modulator RF OUT port
8. Connect baseband audio and video signals to the AUDIO IN and VIDEO IN ports
respectively
9. Connect modulator RF output to television/monitor. (Make sure to use the proper size
attenuator between the modulator and television so as not to overdrive the television
10. Turn on television and set to modulator channel
11. Turn the AUDIO adjustment on the front of the modulator to set the sound on the
television equal in volume to an off-air channel
12. Turn the VIDEO adjustment to set the video modulation.
Over-modulation causes buzzing sounds, overly bright scenes, and distorted
pictures.
Under-modulation results in pictures with dull white levels and dark colors.
13. Remove television/monitor and attenuator from the modulator RF OUT port.
14. Connect modulator RF OUT port to the RF input of the head-end system


Produkt Specifikationer

Mærke: Holland Electronics
Kategori: Ikke kategoriseret
Model: HMMS-34

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