FREQUENCY COUNTERS

 

STARTEK ATH SERIES

User’s  Manual

 

 

This Manual has been edited for web viewing.

  

 

 Photo shows model ATH-15, front & side view, with #CC-90 Case, 
#TA-90 Telescoping Antenna and AC Adapter / Charger.

    

Information and specifications in this document are subject to change without notice or obligation.

 

User's Manual

 

STARTEK ATH SERIES

 

ATH-10   ATH-15   ATH-30   ATH-50

 

 

 

 

 

TABLE OF CONTENTS:

 

 

 

 

 

 

 

 

 

 

The STARTEK ATH SERIES frequency counters are sub-compact, pocket size units, designed for ease of use and dependable performance. Utilizing computer aided design and built with top shelf, commercial grade components, the low cost of these instruments belies the quality construction and useful, innovative features found throughout the product line.

 

ATH refers to the new & unique, High Speed, Auto Trigger & Hold circuitry that is standard on all ATH series frequency counters. This new and highly significant feature enables reading of very short signals (80 ms or longer) and also includes an automatic clean dropout function that prevents a false display when a signal stops amid a sample count or gate time.

 

The Response Time or time from the start of an input signal until the frequency is displayed, has been dramatically speeded up over previous models, about 10 times faster.

 

The Auto Trigger & Hold feature and Fast Response Time dramatically change the way these instruments can be used. They offer enjoyment and convenience  never before experienced with inexpensive instruments of this type. 

 

The STARTEK shirt pocket frequency counters are used by professionals and amateurs alike for finding and identifying frequencies, counter surveillance functions, repair and adjustment of equipment, monitoring RF output from transmitters and signal generators, tuning antennas with antenna analyzers, field strength measurement and much, much more.

 

STARTEK frequency counters are designed and assembled at our own facility in 
Ft. Lauderdale, Florida, USA.

 

 

Below are some of the features common to all ATH SERIES frequency counters. 

 

 

   ATH --  AUTO TRIGGER & HOLD

 

   ULTRA FAST RESPONSE TIME

 

   MAXIMIZED SENSITIVITY

 

   DISPLAY HOLD SWITCH

 

   HIGH EFFICIENCY, HIGH BRIGHTNESS, RED LED DISPLAY

 

   NI-CAD BATTERY PACK & AC ADAPTER STANDARD

 

   HIGH GAIN MULTI-STAGE INPUT AMPLIFIER CIRCUITS

 

   9-12VDC AUTO-POLARITY INPUT POWER JACK

 

   BLACK ANODIZED ALUMINUM CABINET

 

   SUB-COMPACT SIZE: <14 CUBIC INCHES, 9 OUNCES

 

 

ATH SERIES  FEATURES by MODEL

 

FEATURES	ATH-10	ATH-15	ATH-30	ATH-50
FREQUENCY RANGE	1 MHz - 1200 MHz	1 MHz - 1500 MHz	1 MHz - 2800 MHz	5 Hz - 2800 MHz
AUTO TRIG & HOLD	yes	yes	yes	yes
SIGNAL BAR GRAPH	no	yes	yes	yes
LOW BATTERY IND	no	yes	yes	yes
ONE-SHOT & RESET	no	optional	yes	yes
HI-Z  LOW RANGE	no	no	no	yes

 

 

ATH FREQUENCY COUNTER MODELS:

 

 

 

 

MODEL	LOW RANGE	HIGH RANGE
ATH-10	1 MHz to 400 MHz	25 MHz to 1.2 GHz
ATH-15	1 MHz to 500 MHz	25 MHz to 1.5 GHz
ATH-30	1 MHz to 800 MHz	1 MHz to 2.8 GHz
ATH-50	5 Hz   to    50 MHz	10 MHz to 2.8 GHz

 

 

 

 

Auto Trigger & Hold Response Time is the Total Time required from the start of a readable signal, to automatically read, compute, display, lock and hold the frequency data (not just gate time). Resolution is shown as the value of the least significant digit.

 

COUNT    ATH-50                      ATH-10/15/30           ATH-10/15/30/50

                  LOW RANGE           LOW RANGE           HIGH RANGE

 

FAST         0.12 sec / 100 Hz        <0.2 sec / 1 KHz         <0.08 sec / 10 KHz

MED          0.48 sec / 10 Hz          <0.8 sec / 100 Hz       <0.31 sec / 1 KHz

SLOW       4.08 sec / 1 Hz            <6.6 sec / 10 Hz         <2.62 sec / 100 Hz

 

 

 

 

A two inch, 10 segment, red LED Bar Graph, indicates relative signal strength. Works on all frequency ranges (except the High

Impedance-Low Range on the ATH-50s produced after Jan 1998), instant reading, functions independently of counter, works with Display Hold on or off.

 

 

STANDARD

TIMEBASE:            TCXO,  +/- 1PPM typ. at room temp.,  +/- 1 count.

 

The standard timebase consists of a discrete xtal oscillator circuit with temperature compensating components, aging <0.5 PPM/yr typ. Adjustable through a small hole in the front panel labeled CAL.

 

Option #HST-15

TIMEBASE:            TCXO,  +/- 0.2PPM, 18-40 deg. C typ.,   +/- 1 count.

 

The option #HST-15 provides an upgraded, ultra high stability TCXO timebase (sealed module), factory installed in counter and adjusted through small hole in cabinet back. Aging <0.2 PPM/year typ. 

 

 

 

ATH-10/15/30  &                         50 ohm impedance,  BNC connector,

ATH-50  HI RANGE                    vswr <2:1 typ., MMIC amp stages,

                                                        max input +15dBm/1.26V RMS.         

                                                                       

ATH-50  LO RANGE                 1 megohm  nominal impedance,

                                                      BNC connector. Diode protected FET input and 3 stage IC amplifier circuit.       
                                                      Max input +10dBw or 22V RMS.

 

 

Typical sensitivity stated in  millivolts RMS

 

FREQUENCY	ATH-10/15	ATH-30	ATH-50
5 Hz - 1 MHz	n/a	n/a	5-10mV  (Hi-Z)