Telemetry field station

High Performance Analog Telemetry Field Station
Model PTS-3bgX

The VLF PTS series of analog field telemetry system represents a flexible means for transmitting seismic signals through analog transmission (telephone or radio).

It is a full featured high performance system, that includes an amplifier, crystal stabilized VCO, multiplexer with signal conditioning (for single repeater applications), highly temperature stable regulated power supply, and temperature compensated battery charger with solar panel input.

The PTS series offers many features unavailable on other models. It has the highest dynamic range available for analog telemetry, featuring a standard bi-gain amplifier with integral anti-alias filtering and RF interference filtering. A crystal referenced phase locked VCO eliminates center frequency drift caused by temperature changes and component aging. It is very low power, easy to use, easy to field repair or upgrade. A rugged and well-shielded enclosure makes it perfectly suitable for portable and rapid deployment applications in addition to permanent monitoring. All internal modules are conservatively designed and include ample transient suppression and noise filtering.

Coupled with the low noise discriminators (model DSC-20) at the central site, this field system offers the user a simple, easy to maintain, cost effective transmission system. Other system components include external multi channel multiplexer (Model PTS-9MX), lightning suppression systems (Model LPS-x), external signal band pass, high pass, or low pass filters (Model TC-70X), central site digitizing and recording systems (Model PMD6102), and analysis software.

FEATURES

Low Power

Crystal Stabilized VCO

Phase Locked VCO
High Dynamic Range

Muliplexer Included

Solar Regulator

Rugged

Radio, Telephone, or Direct 2-wire

Reliable

No Frequency Drift Due To Temperature Change Or Component Aging

Rugged

Field Upgradeable and Repairable

SPECIFICATIONS

INPUT CHANNELS

Number of Input Channels:

1 through 3("x" indicates number of channels)

High Dynamic Range option

2 through 6 output channels (high/low gain)

AMPLIFIER (AS-110DG-SE or DIF)

Input configuration:

Single-Ended (SE) or Differential (DIF)

Input voltage:

±5.0 V

Output voltage:

±5.0 V nominal, ±5.5 V Maximum

Input impedance:

10K ohm differential or 100K ohm single ended

Input noise

0.25 µV rms, 0.6 µV p-p Maximum
(.05 to 25 Hz Bandwidth)

1st Stage Gain:

Single Ended: 0 to 48 dB in 6 dB steps,
switch selectable
Differential: 24 to 48 dB in 6 dB steps,
switch selectable

High-Low Gain Output Separations:

0, 24, 30, 36, or 42 dB, switch selectable

Maximum Gain:

90 dB

Minimum Gain:

Single Ended: 0 dB, Differential: 24 dB

Gain accuracy:

± 0.35dB

High pass filter:

2 pole, .05 Hz/pole (20 seconds), fixed, other values available by special order

Low pass filter:

Standard 25Hz, 6.25, 12.5, and 50 Hz with other values available by special order.

Low pass filter type:

5 pole Butterworth, other responses available by special order

RF suppression:

2 poles 1.5 KHz

Transient suppression:

1 stage

Input voltage Maximum:

10 Vp-p (±5V)

Supply current at 12.8 VDC

1.2 mA per amplifier board

Adjustments:

High and low gain dip switches

VOLTAGE CONTROLLED OSCILLATOR (TC-10XV)

VCO Type:

Crystal stabilized phase locked

Input modulation voltage:

±5.00 VDC for ± 125 Hz

Deviation:

±125 Hz (other deviations available)

Linearity:

1% or better

Center frequencies:

341.33 Hz spacing, 682.3 Hz to 3072 Hz, (higher frequencies available)

Center frequency stability:

±1Hz over full temperature range

Residual FM:

0.05 Hz

Dynamic range:

Single: 66 dB Maximum
Bi-gain: 108dB Maximum

Output amplitude:

0 to 3.5 Vp-p adjustable

Output waveform:

Digitally generated sine wave

Output Harmonic distortion:

0.1% or less

Output Residual AM :

1% or less

Supply current at 12.8VDC:

2-3 mA (frequency dependent)

Adjustments:

Lock range, Deviation, Output amplitude

SENSOR CALIBRATOR (TC-205SG)

Calibration type:

Pulse current

Recurrence rate:

12 or 24 Hr switch selectable

HOW TO ORDER

Recurrence rate accuracy:

15 seconds/day

Basic PTS-3-1 Configuration	The standard configuration includes 1channel with internal multiplexer, and solar regulator, mating connectors and manual.




Channel Configuration	option -2 (2 channels) or -3 (3 channels)
Bi-gain Option	option -bg2 (1 channel), -bg4 (2 channels), or bg-6 (3 channels)
Standard Low Pass Filters	-xxLP (where xx indicates frequency)
Standard VCO Center Frequency	-xxxxCF (where xxxx indicates frequency)
Optional High Pass Filters	option -xxHP (where xx indicates frequency)
Optionall VCO Deviations	option -xxxDV (where xxx indicates frequency)
External Input Filtering	option TC-70-BP, -xxxLP, or -xxxHP
External Input Amplification	option TC-80 -AT, or -AG
Sensor Options	EP-105 Broadband, SP-400 Medium Period Seismometer, R-1 Rotational Seismometer EV-12 Force Balanced Velocity/Accelerometer EA-120 Force Balanced Accelerometer
Receiving Components	TC-20DS Discriminator Card Rack Enclosure Field Case Enclosure
Recorder Options	DAS-6102 Field Recorder DAS-6102-PC Desktop Recorder
Lightning Protection	LPS-xx (depends on what is being protected, consult factory)
Other	Radios Anntenas Solar Systems (Consult factory for correct configuration)
Supplies and Accessories	External Battery Pack Charger
General Spares	Spare boards (specify) Charger Battery (specify capacity)

S Printer Friendly Format For Specifications

Output pulse width:

10 seconds

Output current:

From 0.5 to 31.5 mA, switch selectable in 0.5 mA increments

Supply current at 12.8 VDC:

0.3mA quiescent, 32mA max during calibration

Output Voltage:

12V maximum

Transient Suppression:

1 stage output

Adjustments:

Recurrence rate, cal current, clock reset

MULTIPLEXER (included on TC-60PS)

Type (standard):

Optional

Local channels plus external receiver/telephone signal
External PTS-9MX up to 8 channels

Output voltage:

15 Vp-p maximum

Output Impedance:

600 ohm

Output coupling:

Transformer (user defined ground)

Harmonic Distortion:

0.1% or better

External Receiver coupling:

Tansformer (user defined ground)

Receiver Input voltage:

10 Vp-p Maximum

Receiver input impedance:

600 ohm

Multiplexer gain:

Adjustable 0 to 5

Transient suppression:

2 stage

Supply current at 12.8VDC:

1.5 mA.

Adjustments:

Output level

Multiplexer External Input Signal Conditioning (Optional TC-70-x & TC-80)

Filter Types

Bandpass, low pass, high pass.

Line Amplifiers:

Passive attenuator, or adjustable gain to a maximum 10 (20 dB)

Solar regulator and battery low voltage disconnect (Model SR-10)

Type:

Temperature compensated for 12V lead acid battery.

Maximum input voltage:

22 VDC

Maximum input current:

7A (replaceable fuse)

Solar panel blocking diode

High efficiency Schottky

Output voltage:

13.5 VDC at 70°F

Temperature compensation:

-18mV per °C

Output voltage adjustment range:

13 VDC to 14 VDC

Maximum charge voltage:

14.75 VDC

Input output differential at 7A:

1.1V max

Transient protection:

1 stage

Charge indicator:

Yellow LED, Lit above 14.5 VDC

Low Voltage disconnect:

Removes power from telemetry box and external connected loads

Cutout Voltage:

11.5 VDC, adjustable from 11.3 to 12.3 VDC

Switch Hysteresis:

+0.5VDC above cutout voltage

Maximum output current:

1A (replaceable fuse)

Switch voltage drop at 1A:

80mV

Power good indicator:

Green LED

Supply current:

3.5 mA

Adjustments:

Charge Voltage, Low voltage disconnect

Regulated Internal Power Supply (Model TC-60PS)

Input voltage range:

11 to 15 VDC

Output voltage:

±6.500 VDC, 20 mA max

Output voltage stability:

±5 mV over full temperature range

Supply current at 12.8 VDC:

5mA

Adjustments:

Positive and negative output voltage.

Reference oscillator (included on TC-60PS)

Oscillator type:

Miniature Quartz tuning fork crystal

Reference frequency stability:

±0.25 Hz over full temperature range

Output voltage:

13 Vp-p

Supply current at 12.8VDC:

1.5 mA

System specifications (Model PTS-3-1 thru -3)

Dimensions:

9" W x 9"D x 4.5" H

Box style:

NEMA 4X die cast painted aluminum

Supply Current for G1 system

16 mA nominal

Sensor input mating connector:

PT06A-12-10S

Solar panel input:

2-way banana style binding post

Battery Input:

2-way banana style binding post

Receiver Input mating connector:

PT06A-8-4S

Transmitter Output mating connector:

PT06A-8-4P

Operating Temp:

-30°C to +65°C

Operating Humidity:

0-100% RH

Specifications Subject to Change Without Notice

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