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HMA-860H
AGILE MODULATOR
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LIMITED WARRANTY
Holland Electronics LLC, warrants that the product enclosed with this Limited Warranty statement will conform to the
manufacturer’s specifications and be free of defects in the workmanship
and material for a period of five years (5) from the date of original purchase.
WARRANTY PROCEDURE:
If the product appears to be defective contact Holland Electronics LLC. at (805) 339-9060. We will analyze the problem
and offer solutions to prevent removing the unit from service. If the unit is to be returned for evaluation, you will be
issued a Return Material Authorization (RMA) number.
Holland Electronics LLC will, at its option, repair or replace the defective unit, under warranty, without charge for parts or
labor. This repair will be subject to charges if signs of tampering or misuse are detected. Incoming shipping costs
will be the customers responsibility. Returns will not be accepted without an RMA number.
The warranty and remedy provided above are exclusive and in lieu of all other express warranties and unless stated herein,
any statements or representations made by any other person or firm are void. The duration of any implied warranties of
merchantability or fitness for a particular purpose on this product shall be limited to the duration of the express warranty
set fourth above. Except as provided in this written warranty, Holland Electronics LLC shall not be liable for any loss,
inconvenience, or damage, including direct, special, incidental, or consequential damages, resulting from the use or
inability to use this product, whether resulting from breach of warranty or any other legal theory.
Some states do not allow limitations on how long an implied warranty lasts and some states do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation and exclusion may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
To arrange for Warranty Service: Call Holland Electronics LLC. (805) 339-9060
IMPORTANT!!
WARNING: Holland Electronics LLC does NOT represent this product to be WATERPROOFED. To reduce risk of
electrical shock, fire hazard, or damage to the unit, do not expose to
rain or moisture.
CAUTION: To prevent electric shock, do not use this plug with an extension cord, receptacle or other outlet unless the
blades can be fully inserted to prevent blade exposure.
NOTE TO INSTALLER: This reminder calls the system installer’s attention to Article 820-22 of the NEC that
provides guidelines for proper grounding and, in particular, specifies that the cable ground shall be connected to the
grounding system of the building, as close to the point of
cable entry as practical.
WARNING:
TO PREVENT FIRE OR ELECTRICAL SHOCK, DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE
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Specifications
Description
The HMA-860H is a microprocessor controlled
rebroadcast quality, phase locked loop synthesized,
frequency agile CATV television modulator. The
double conversion and superior SAW filtering provides
adjacent channel compatibility and spurious free
output. The HMA-860H provides 60dB output level
frequencies. The channelization configuration can
be changed by the up/down buttons located on the
front panel. The modulator is shipped with all internal
adjustments preset and FCC Docket 21006 offsets are
standard. The unit conforms to FCC Docket 21006
for frequency accuracy.
from 50 to 860 MHz including STD and HRC offset
Features
• Double heterodyne conversion
• SAW filtered
• Double I.F. loop; separate audio and video.
• Composite I.F. loop (45.75 MHz)
• Automatic band splitting filters for superior carrier to
noise ratio.
• BTSC 4.5 MHz stereo capability
• Supports HRC, IRC, frequency offsets
• Front panel -30dB test point
• Five year warranty
Specifications
RF --------------------------------------------------------
Channels:
Frequency Range:
Output Level:
57 dBmV min., 60 dBmV typ. Ch. 79-135
adjustable from front panel
Output Impedance:
Audio/Video Ratio: Adjustable -7 to -22 dB below video
Frequency Stability:
Carrier to Noise (In-band):
Spurious Output (A/V Ratio @ -15dB): In Band
Spurious Output: Outside Ban
Audio/Video Ratio:
---------------------------------------------------------
Video
Input Level:
Input Level Range:
Input Type:
Frequency Response:
60 dBmV min., 62 dBmV typ. Ch. 2-78
75 ohm
Video 45.75 MHz
Audio 41.25 MHz
1 V p-p min. at 87.5% modulation
134 channels (2-135)
54 - 860 MHz
carrier
± 5 KHz in aeronautical band
>60 dB
>65 dBc
(typical)
d
Clamped video negative sync
±0.8 dB, 30 Hz to 4.2 MHz
>60 dBc
0.5 to 1.5 p-p
Differential Gain:
Differential Phase:
Chrominance Luminance Delay:
Hum and Noise:
Video Signal to Noise:
Audio
Baseband Input Impedance:
Baseband Input Level:
Pre-Emphasis:
Flatness:
General
Power Input
Operating Temperature:
Dimensions:
Weight: 8 pounds
Connectors:
NOTE: Meets FCC group delay pre-distortion correction for
color transmission.
--------------------------------------------------------
0.5 Vp-p for 25 KHz peak deviation
-1.5dB max. 15 Hz to 15 kHz
-----------------------------------------------------
:
100 - 240 VAC 60 Hz
All “F” type except RCA type for
<5% (10 to 87.5% APL)
<5°(10 to 87.5% APL)
< ± 50ns
-60 dB @ 87.5% modulation
-60 dB minimum (weighted)
600 ohms unbalanced
75 microseconds
-10℃ to +55℃
19”W × 9.375”D × 1.75”H
baseband audio
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Front & Rear Panels
1. Power On LED:
Indicates power is on when lit.
2. Video modulation LED :
Indicates video over-modulation when lit.
3. Video Modulation Adjust :
Used to set video modulation level.
4. Video/Audio Ratio adjustment :
Used to set level of audio carrier.
5. Audio Modulation Adjust :
Used to set audio modulation level (volume).
6. Audio Modulation LED :
Indicates aural over-modulation level when lit.
7. Channel Display :
Indicates which channel is active.
8. Offset Indicator LED’s :
Indicates if standard or off-set formats are active.
9. Offset selector :
Used to select standard or off-set formats.
10. Channel selectors :
Used to select desired channel.
11. RF Level Adjust :
Used to set RF level.
12. -30 dB Test Point :
Used to monitor RF output level.
13. RF Output port :
Connect this port to distribution system.
14. Composite I.F. Input :
Input from I.F. scrambler or I.F. output.
15. Composite I.F. Output :
To I.F. input or to scrambling device.
16. Video I.F. Input (45.75 MHz) :
Video carrier I.F. input from video scrambling
device or video carrier I.F output.
17. Audio I.F. Input (41.25 MHz) :
Sound carrier I.F. input from audio scrambling
device or sound carrier I.F. output.
18. Video I.F. Output (45.75 MHz) :
Video carrier I.F. output to scrambling device or
video carrier I.F. input.
19. Audio I.F. Output (41.25 MHz) :
Sound carrier I.F. to audio scrambling device or
sound carrier I.F. input.
20. 4.5 MHz Input :
Input for BTSC stereo encoder operation.
21. Video Input :
Accepts any baseband video output source such
as a satellite receiver, VCR, security camera or
cable converter.
22. Audio Input (Left and Right) :
Accepts any baseband audio output source such
as a satellite receiver, VCR, security camera or
cable converter.
23. Convenience Outlet :
Standard U.S.A. type shown
24. Power Cord :
Three wire, standard U.S.A. type.
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Installation Procedure
Adherence to these precautions will help prevent
problems during initial installation of the HMA-860H.
1. Connect the I.F. jumper from the I.F. output to the
I.F. input on the rear panel. Connect I.F. jumper
from the V.I.F. output to the V.I.F. input. Connect
I.F. jumper from the S.I.F. output to the S.I.F. input.
2. Connect the HMA-860H to a 100 - 240 VAC grounded
receptacle. Observe the lit LED light indicating
power is on.
3. Using a signal level meter or spectrum analyzer,
set the output level.
4. Check the aural carrier level. It should be set at 15
dBmv below the video carrier.
5. Connect a 1.0 volt peak-to-peak video source to
the “VIDEO IN” on rear panel. Connect the
HMA-860H “RF OUT” to a TV set, and compare
the contrast and brightness to a known signal (use
off-air signal to insure a proper modulation level).
If necessary, adjust the video modulation until
proper contrast is observed.
6. Connect an audio source to the “AUDIO IN” on
rear of the unit. Set audio modulation (peak
deviation) to 25 kHz with the audio modulation
adjustment. A known off-air signal and a TV may
be used to set adjustment for equal audio level.
WARNING: When connecting the HMA-860H from the
rear panel “RF OUT” directly to a TV set,
attenuate the output sufficiently to prevent
overdriving the TV or use the -30dB front panel
test point for monitoring the modulator output.
7. Connect the “RF OUTPUT” to a proper combining
network.
Frequency Offsets
T
he federal Communications Commission
requires that cable system modulators which operate
in the aircraft communications and navigation bands
be offset in frequency by 12.5/25.0 kHz. The HMA-860H
FREQUENCY CHANNEL NUMBER OFFSET
120 to 138 MHz ---------------------- A,B,C --------------- 14,15,16 ----------- 12.5 KHz
108 to 120 MHz ---------------------- A-1, A-1 ------------ 99,98 --------------- 25 KHz
228 to 330 MHz ---------------------- L – EE--------------- 25-41 --------------- 12.5 KHz
330 to 336 MHz ---------------------- FF-------------------- 42 ------------------- 25 KHz
336 to 404 MHz ---------------------- GG-QQ ------------- 45-53 --------------- 12.5 KHz
PLL oscillator is factory setto comply with FCC
requirements for frequency accuracy (+/- 5 kHz) in the
aeronautical communication and navigation bands.
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