SAMSON CONCERT IV service manual

Concert IV is a Microprocessor True Diversity
VHF wireless system designed for use in live per­formance applications and permanent installa­tions. This metal case, one-space rack-mount
wireless system provides superior performance
and durability. Concert IV features balanced XLR
and unbalanced 1/4" outputs, removable anten­nas for front or rear mounting, a front panel
multi segment audio level meter, and variable
squelch and audio output controls.

Concert IV is available in handheld micro­phone, lavalier and headset systems, all with a
wide variety of mic elements to choose from.
Instrument systems (with 1/4” connector or
wind instrument mic) are also available. All trans­mitters utilize a 9V alkaline battery with a 18–20
hour battery life. Concert IV is approved for
worldwide use, has a 3 year warranty and is
made in the U.S.A.

• Microprocessor True Diversity

™

.

• 19˝ rackmount metal chassis.

• Balanced XLR and unbalanced 1/4˝
outputs.

• 300 Feet overall range.

• Removable antennas for front or rear
mounting.

• Transmitters use 9V battery (18-20
hours).

• Multi-segment audio level meter.

• Variable squelch and audio output controls.

• Approved for worldwide use.

• Made in the U.S.A.

• 3 Year warranty.

• Up to 13 systems can be used simultaneously.

Samson Technologies Corp., P.O. Box 9031, Syosset, NY 11791-9031 • Phone: [phone] • Fax: [phone] • www.samsontech.com

Contact:

MICROPROCESSOR

TRUE DIVERSITY

WIRELESS SYSTEMS

CONCERT SERIES IV

VHF 173.6 MHz — 216.2 MHz

ARCHITECT’S & ENGINEER’S

SPECIFICATION

The Samson Concert Series IV VHF Wireless System shall
be of a single-channel, crystal-controlled oscillator type oper­ating on selected frequencies from 174.6 - 213.2 MHz. The
System shall include a beltpack or handheld transmitter and a
receiver, and shall allow operation of at least thirteen simulta­neous systems on separate channels. The transmitter and
receiver shall incorporate compander circuitry for noise
reduction and maximum dynamic range.

The receiver shall provide a balanced microphone-level
output on a male XLR-type connector and an unbalanced

microphone-level output on a 1/4″ phone connector. The

unit shall have a 5 segment AF level meter indicating 10%,
25%, 75%, 100% and 125% of audio signal. The audio output
level shall be adjustable with a variable attenuator. The
receiver shall incorporate a power LED and dual LEDs for car­rier indication. The receiver shall have an automatic signal
sensing squelch circuit with a variable attenuator. The receiv­er shall incorporate Microprocessor True Diversity circuitry
for automatic antenna switching. The receiver shall use two
12 VDC powered 1/4-wave removable antennas on M-J con­nectors. The receiver shall be powered by 115 Vac, 50/60 Hz
via a supplied 12 VDC adapter. The receiver shall be notified
under FCC rules, Part 15, and DOC certified under RSP 121.
The receiver shall be of a rack-mount type. Dimensions of

the receiver shall be 19″ (480 mm) wide, 3.8″ (96 mm) deep
and 1.7″ (44 mm; 1 rack space) high. Weight of the receiver

shall be 3 lb. (1.4 kg).

The beltpack transmitter shall provide either a micro­phone-level input on a Switchcraft TA3F P3-type connector

or an instrument-level input on a 1/4″ phone connector. The

beltpack audio input sensitivity or handheld microphone out­put level shall be adjustable with a variable attenuator. The
transmitter shall provide a mute switch. The transmitter shall
incorporate a battery strength LED and shall use an internal
dipole antenna. The transmitter shall be powered by a 9 V
alkaline battery and shall provide a nominal battery life of not
less than 18 hours. The transmitter type shall be accepted
under appropriate FCC rules. Dimensions of the beltpack

transmitter shall be 2.6″ (65 mm) wide, 4.3″ (110 mm) deep
and .9″ (22 mm) high. Weight of the beltpack transmitter

shall be 3.1 oz. (90 g). The System shall carry a three-year
warranty.

The System shall be a SAMSON CONCERT SERIES IV VHF

CONCERT SERIES IV SPECIFICATIONS

RF Frequency Range: 173.6 - 216.2 MHz

Frequency Response: 40 Hz to 15 kHz ±3 dB

Squelch Sensitivity: 18 dBu

Antenna Terminals (Receiver) 50 Ω, M-J input connector

powered 12 VDC 160 mA max.

Antenna Type:

Receiver: 1/4 λ rod
Transmitter (HT4): Internal dipole
Transmitter: (CT4G/CT4L): External (Gtr/Mic cable)

Antenna Gain: < 2.14 dB

AF Level Meter: 10%, 25%, 75%, 100%, 125%

Bandwidth Selectivity: ± 150 kHz @ -60 dB

Audio Outputs (Receiver):

Unbalanced (-10 dB, 5 k 1/4′′ phone type connec-

tor)

Balanced (-30 dBm, 600 Ω, XLR type connector)

Input Power (Receiver): 11 - 13.2 Vdc 1.9 W, 160 mA

Maximum Audio Input Level

Transmitters: -30 dB adjustable (∆f=±15 kHz)

RF Sensitivity: 21 dBu @ s/n 55 dB

Signal To Noise Ratio: > 94 dB (IHF-A weighted)

Dimensions

Receiver (w/o antennas): 19″ (w) x 3.8″ (d) x 1.7″ (h)

480 mm (w) x 96 mm (d) x 44 mm (h)

Transmitter (CT3L/CT3G) 2.6″ (w) x 4.3″ (d) x .9″ (h)

65 mm (w) x 110 (d) x 22 (h)

Transmitter (HT3): varies with mic type

Weight:

Receiver (including antennas): 3 lb. / 1.4 kg
Transmitter (CT3L/CT3G): 3.1 oz. / 90 g
Transmitter (HT3): varies with mic type

Specifications subject to change without notice. © 1998 SAMSON