ORBIT FR AL-38000 User Manual

LIGHT DUTYAL-38000 SERIES

>

Model Towers – Light Duty

AL-38000 Series

➊ APPLICATIONS

• General Purpose Positioning

Subsystems

• Far-Field & Near-Field Antenna

Measurements

• Indoor Use

➋ PRODUCT HIGHTLIGHTS

• Linear Bearings

• Scale (Offset Indication)

• Mechanical Stops

• Manual AUT Adjustment over Lower

AZ Center of Rotation

• Compatible with Standard Antenna

Positioners (Support Wiring Required)

116

AL-38100

Our AL-38000 model towers are suited for
light duty applications with an operating
load of up to 150 lbs (68 kg). This series
is available with a choice of either a manual
or motorized linear offset slide.
The manual slide can be hand-push
or handwheel. The mast, which can be either
vertical or inclined, is available in fi berglass
or aluminum construction.

AL-38100

supplied accessories

technical notes

>

CD-ROM Documentation Set:

 User Manual (Installation, Setup, Operation & Maintenance)

>

Cables:

 Cable Carrier
 Interconnect Cable for Connection to Lower Positioner

optional accessories

 Absorber Plates
 Alignment Fixture Between Roll Positioner & Mast
 Counterweights (may apply if elevation axis is defi ned)

 1 Model tower height is defi ned as the distance from

the base of the linear offset slide to the center of the
roll axis. The height of the model tower assembly will
impact pickup mode in lower positioners containing an
elevation axis. Defi ne elevation measurement angles and
verify lower positioner specifi cations when confi guring
this product.

 2 The lower positioner may require electrical wiring and/

or an RF path to support the model tower. Options are
available for the lower positioner, including EX002, SR,
and RJ. Lower positioner is purchased separately.

 3 All accuracy data is based on no-load conditions.

Contact ORBIT/FR for accuracy under load conditions.

 4 Roll axis is equipped with adjustable limit switches

capable of approx 20° up to 900° total travel.
When rotary joint options are specifi ed, limit switches
remain but are electrically disabled. Roll axis is
factory-set at 400° (± 200°).

 5 Rotary joint options may alter the original physical

profi le of the roll axis stage. Consult ORBIT/FR.

 6 Verify model tower’s maximum swing radius

(G - clearance to absorber) when specifying
this product for use inside an anechoic chamber.

 7 Dimensions may vary depending on fi nal confi guration.
 8 Standard offset slide travel is 24 inches. Other lengths

are available in one foot increments, up to 8 feet.

 9 An optional alignment fi xture can be installed between

the roll axis positioner and mast.

ORDERING INFORMATION

• Build your confi guration using the ordering example below.

AL-38100 HW 24 96 F C 360

Model Tower Series

38100 - Manual

38200 - Motorized

* To order with integrated gearhead, leave the end of the part number blank and add GH1 as a separate line item.
For GH1 specs, refer to specifi cation table on page 118.

-- - - - -

Linear Offset

Slide Travel (in)

Mast Construction

(Fiberglass or

Discrete Positioner

Aluminum)

HP - Hand-push

HW - Handwheel

M - Motorized

Total Roll-to-Base

Height (in)

Mast

C - Inclined

V - Vertical

> Model Towers

Model*

117

Specifi cations - AL-38000 Series Model Towers Light Duty

Manual Motorized

Parameter Units

AL-38100 AL-38200

Technical Notes

Model Tower Assembly

Model

1, 2, 3, 4, 5, 6, 7, 8, 9

Operating Load (maximum)

Total Model Tower Height (F) (maximum)

Fore-Aft Bending Moment (maximum)

Maximum Swing Radius (H)

Weight (Approx.)

1. Roll Positioner

Maximum Roll Positioner

Discrete

Option 1:

Maximum Roll/EL Positioner

Positioner

Gearhead Model

Operating Load

Delivered Torque

Withstand Torque

Gearhead Turntable Bending Moment
(maximum)

Motor Drive Power
Nominal Speed
Roll Standard Angle Transducer Format
Roll Standard Accuracy

Option 2: Integrated Gearhead

Roll Maximum Backlash

Gearhead Flange Diameter

Thru-Hole Diameter

lbs 150
kg 68

1

ft 10
m 3
ft-lbs 300
m-kg 42
in 40
mm 1,000
lbs 154 209
kg 70 95

AL-360-1P

AL-4369-1

GH1
lbs 150
kg 68
ft-lbs 90
m-kg 12
ft-lbs 120
m-kg 17
ft-lbs 300
m-kg 42
hp 1/8
rpm 1

Dual Speed Synchro
deg ± 0.15
deg 0.15
in 4
mm 100
in 1.3
mm 33

118

Specifi cations - AL-38000 Series Model Towers Light Duty

Manual Motorized

Parameter Units

AL-38100 AL-38200

2. Mast

Model

Mast Style
Mast Construction

3. Linear Offset Slide

Limit-to-Limit Travel8 (A) (maximum)

Slide Bending Moment (maximum)

Motorized

Manual and

Slide Construction
Slide Standard Angle Transducer Format

Slide Standard Accuracy

Slide Maximum Backlash

Motorized Only

4. Lower Positioner

Lower Positioner

2

Environmental

Operating Temperature

Options*

Vertical or Inclined

Fiberglass or Aluminum

in 24
mm 610
ft-lbs 90
m-kg 68

Aluminum

Dual Speed Synchro
in ± 0.005
mm ± 0.13
ft-lbs 0.002
m-kg 0.05

> Model Towers

Refer to AZ, AZ/EL, EL/AZ

or AZ/EL/AZ catalog section

- 4° F to 140° F (- 20° C to 60° C)

EN001

EN004

EN005

RJ

MM Mounting Thread
IC Interlock Circuit
CW Counterweight

(*) See Options Glossary on page 132

(-) N/A S Standard Opt Optional

Incremental Encoder (Standard Accuracy)
Accuracy
Absolute Encoder (Standard Accuracy)
Accuracy
Gearhead Incremental Encoder

(High Accuracy)
Accuracy

4,5

Rotary Joint

Opt

deg ± 0.1

Opt

deg ± 0.1

Opt

deg ± 0.07

RJ12U
RJ18U
RJ40U
RJ50U

MM002
IC002
CW001

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