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HSM55-**
Fixed Channel SAW Filtered Modulator
HSM55 SPECIFICATIONS:
RF
Output Levels 45-55dBmV (Adjustable)
Output Range 10dB min
A/V Ratio -11 to –22 dB (Adjustable)
Spurious Harmonics -60dB
Frequency Accuracy ±5kHz
C/N (In Channel) 60dBc
Out-of-Band Noise -95dBc (4MHz Bandwidth)
Video Minimum Input Level 0.7V p-p for 87.5% Mod.
Flatness ±1.5 dB, 30 Hz to 4.2 MHz
Modulation Range 60-95% (Adjustable)
Input Impedance 75 Ohms
Differential Phase 2°
Differential Gain 3%
Audio Input Level 500mV p-p for ±25kHz Dev
Aural Frequency 4.5 MHz ±1.5 kHz (Above Video)
Distortion Less than 1.5%
Input Impedance 600 Ohms Unbalanced
Flatness ±1 dB (50Hz to 15kHz)
Installation Instructions:
1. Your HSM55 may be mounted in any standard 19” rack.
2. Use 3 F type input/output cables from the video source to the HSM55 as follows:
A: Connect Video from any VCR/DVD, Satellite Receiver, or Demod to the video input.
B: Connect Audio from any VCR/DVD, Satellite Receiver or Demod to the audio input.
C: Connect the RF output of the HSM55 to the system or system combiner
Required Equipment:
1. Spectrum Analyzer or Field Strength Meter
2. TV or Monitor
Operation Instructions:
Please note: A 30-Minute warm up prior to adjustments is advised.
1. Plug the power cord into either a 110VAC outlet, or another HSM55 via the
auxiliary outlet on the rear panel. It is recommended that a SURGE
PROTECTOR be used between the modulator (s) and the 110VAC outlet.
2. Connect your analyzer or field strength meter to the HSM55’s test port (-20dB) or
combiner.
A. Adjust the RF output to the desired level
B. Adjust aural carrier @ -12dB to -17dB below the picture carrier by turning
the Aural Carrier adjustment pot. Connect a TV or Monitor to the test port
(-20dB) or to your combiner output, using proper attenuation in order to
prevent overdrive of the TV or Monitor.
3. Adjust the Audio Deviation pot until the audio level on the TV set is an equal
level to that of an off-air channel.
4. Adjust the video modulation pot until the proper viewing level is achieved.
Overmodulation causes buzzing, overly bright scenes, and distortion. Under
modulation results in dull white levels and dark colors.
RF Channels 2-125
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IMPORTANT!!
WARNING: Holland Electronics 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
HOLLAND ELECTRONICS LLC
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 customer’s 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 wa rranties 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
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