Morrow Apollo SL40 User manual

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II Morrow Inc.
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© 1997 by II Morrow Inc. All rights reserved.
Printed in the U.S.A.
II Morrow Inc.
2345 Turner Road S.E.
Salem, OR 97302
U.S.A. Toll Free 800.525.6726
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International 503.391.3411
FAX [phone]
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History of Revisions
December 1996 Original
Release
March 1997 Rev. -01
Ordering Information
To receive additional copies of the Apollo SL40 User’s Guide,
order part #560-0954-01.
II MORROW
VISIONARY THINKING TODAY

Welcome ...
Welcome to a new era of aviation communication. Once
again, II Morrow Inc. has set new standards in features
and ease of use for the general aviation public. The
Apollo SL40 is a VHF Communications Transceiver for
use by the aviation pilot. Packaged in a new slim form
factor that helps you get the most out of limited panel
real estate without limiting features and performance.
The Apollo SL40 is unequaled in providing the features,
level of performance, and reliability that aviation users
expect. The Apollo slim line series of avionics sets a
precedent that will be the standard that all other avionics
will be compared to. You can be confident in knowing
that you are the owner of the state-of-the-art in aviation
communication. Our products are built to last and to
allow for upgrading as your needs change in the future.
i
Welcome ...

Table Of Contents
Welcome ... ....................................i
Introduction ......................................1
Display .......................................1
Annunciators...................................1
Controls.......................................2
Power/Volume/Squelch Knob....................2
Small and Large Knobs.........................2
Buttons .......................................2
Flip/Flop (Arrows) ............................2
EC (Emergency Channel).......................2
MON (Monitor)...............................2
RCL (Recall).................................2
MEM (Memory) ..............................2
Basic Operation ...................................3
Power On/Off ..................................3
Volume .......................................3
Selecting Frequencies ............................3
Frequency Monitoring............................4
Recalling a Frequency............................4
Remote (REM) ...............................4
Auto Stack List (LST)..........................5
User Stored Frequencies (MEM) .................6
Weather (WTH)...............................6
Intercom Function...............................7
Stuck Mike ....................................7
System Functions..................................7
Software Version................................7
RF Level (RFLVL) ..............................8
Noise Level (NOISE) ............................8
Intercom Squelch ...............................9
Headphone Level ...............................9
Intercom Audio Level............................9
Sidetone Level..................................9
Base Station Lockout ...........................10
SL40 Specifications ...............................11
ii
Table Of Contents

Introduction
This guide describes the operation of the Apollo SL40
VHF Communication Transceiver.
Display The 1-line by 16-character display is composed of 5x7
dot matrix alphanumeric high intensity LEDs. A
photocell is located in the top left corner of the front
panel display. The photocell automatically controls the
intensity of the display from low brightness at night to
high brightness during daylight operation.
Annunciators Several annunciators are used to help indicate the
operating modes of your Apollo SL40. The TX
(Transmit) annunciator is lighted whenever you are
transmitting. If the avionics bus drops below 9 VDC, the
SL40 will not transmit. An LED will be lighted above
the MON and RCL buttons when these functions are
selected. An “s” will appear to the left of the Standby
frequency. An “m” will appear to the left of the Standby
frequency when you are using the Monitor function. An
“I” indicates the Intercom function is being used.
TX - Transmit
s - Standby Frequency
m - Monitor Mode
I - Intercom
1
Introduction
EC RCL
MON MEM
TX
POLLO
A
SL40
COM
PULL SQUELCH
VOL
OFF
119.80 s121.50
Power/Volume/Squelch
Photocell
Active
Frequency
Standby
Frequency
Flip/Flop
Frequency
Emergency
Channel
Store
Memory
Recall
Memory
Frequency
Monitor
Large, Outer
Knob
Small, Inner
Knob
Transmit
Annunciator
Standby
Symbol

Controls Power/Volume/Squelch
The knob on the left side of the SL40 controls power
on/off, volume, and squelch test. Rotate the knob
clockwise (CW) past the detent to turn the power on.
Continuing to rotate the knob to the right increases
speaker and headphone amplifier volume level. Rotate
the knob to the left to reduce the volume level. Pull the
knob out to disable automatic squelch.
Large and Small Knobs
The dual concentric knobs on the right side of the SL40
are used to select frequencies or to view the features
available within a function. Details are provided in the
appropriate section.
Buttons Five backlighted buttons allow you to access the
functions in your Apollo SL40.
Flip/Flop (Arrows)
Press the Flip/Flop button to switch between the active
(left-most) and standby (right-most) frequency.
Switching between frequencies is disabled while you are
transmitting.
EC (Emergency Channel)
Press the EC button to load the Emergency Channel
(121.500 MHz) as the standby frequency. The Monitor
function is automatically enabled.
MON (Monitor)
Press the MON button to listen to the standby frequency.
When the active frequency receives a signal, the unit
will switch automatically to the active frequency.
RCL (Recall)
Press the RCL button to retrieve stored frequencies.
MEM (Memory)
Press the MEM button to store the displayed Standby
frequency in memory.
2
Introduction
EC
MON
RCL
MEM
PULL SQUELCH
VOL
OFF

Basic Operation
This section introduces the basic operating details of the
Apollo SL40 VHF Communications Transceiver.
Power On/Off Turn the Power/Volume control clockwise past the OFF
detent.
Volume Turn the Power/Volume control clockwise to increase
the volume level and counterclockwise to decrease
volume.
Selecting
Frequencies New frequencies are first selected as a Standby
frequency and then toggled to the Active side when
desired. While viewing the frequency display, use the
Large and Small knobs on the right side of the SL40 to
select the desired frequency.
1. Turn the Large, outer knob to change
the values in 1 MHz increments. The
MHz selection range is between 118 and
136 in 1 MHz steps.
2. Turn the Small, inner knob to change
the values in 25 kHz increments. The
kHz selection range is between 000 and
975 kHz in 25 kHz steps. Note that only
two digits are displayed to the right of
the decimal point.
Turn the Large and Small knobs clockwise to increase
and counterclockwise to decrease the frequency values.
Standby frequency selection is not inhibited during
transmit.
Press the Flip/Flop button to toggle the
Standby frequency to the Active
frequency.
3
Basic Operation
119.80
119.80
119.80 s121.50
121.50 s119.80

Frequency
Monitoring The Frequency Monitoring function allows you to listen
to the Standby frequency, while monitoring the Active
frequency for activity.
Press the MON button to listen to the
standby frequency. A small “m” is
displayed in front of the Standby
frequency. When the Active frequency
receives a signal, the unit will switch
automatically to the Active frequency.
An arrow (<or >) will point to the
frequency that you are currently
listening to. The volume and sound
quality will be slightly less for the
Standby frequency. The Active
frequency quality is not affected. The
Frequency Monitor function is inhibited
while you are transmitting.
Recalling a
Frequency The SL40 can access several areas of stored frequencies.
The SL40 can also receive airport frequencies from
certain Apollo GPS receivers.
Remote (REM)
The Remote function will allow the SL40 to access the
airport frequency database in the Apollo GPS.
Press RCL to view the Remote (REM)
frequencies. Then, turn the Small, inner
knob to display the available
frequencies. The waypoint identifier,
type, and frequency are displayed.
If not connected to an Apollo GPS, the
identifier field will be blank.
4
Basic Operation
119.10 > m121.50
MON
RCL
Remote
(REM)
Auto Stack
List
(LST)
User
Memory
(REM)
Weather
(WTH)
119.10 REM SLE
119.10 ATS124.55
RCL
119.10 REM ...

TWR - Tower frequency
GND - Ground frequency
ATS - ATIS frequency
ATF - Air Traffic Frequency
APP - Approach
ARR - Arrival
AWS - Automatic Weather Station
CLR - Clearance/Delivery
CTF - Common Traffic Advisory Frequency
DEP - Departure frequency
FSS - Flight Service Station
RFS - Remote Flight Service Station
UNI - Unicom frequency
MF - Mandatory Frequency
Auto Stack List (LST)
The SL40 keeps track of the last eight Active
frequencies and stores them in a stack. When a new
frequency is used, it becomes number one on the stack
and the old number eight frequency is removed. Each
time a new Active frequency is used, the last (ninth)
frequency is automatically dropped off the list. Duplicate
frequencies are not stored.
Press RCL and then turn the Large,
outer knob to display the Auto Stack
List (LST).
Then, turn the Small, inner knob to view
the stored frequencies. The last used
frequency is shown at the top of the list.
5
Basic Operation
RCL
119.10 LST121.80
Freq 1 Freq 2 Freq 7 Freq 8
NEW
OLD

User Stored Frequencies (MEM)
When you press the MEM button the Standby frequency
is stored in User memory. The SL40 stores the last eight
frequencies selected by the user. The next time a new
User frequency is stored, the last (ninth) frequency is
automatically dropped off the list. Duplicate frequencies
are not stored.
Press RCL and then turn the Large,
outer knob to view the last stored User
frequency.
Turn the Small, inner knob to view the
other User stored frequencies.
Weather (WTH)
The standard weather channels are stored in the memory
of the SL40. You cannot transmit on a weather channel
frequency.
Press RCL and then turn the Large,
outer knob to display the weather
(WTH) channel memory.
Then, turn the Small, inner knob to view
the available weather channels.
Weather Frequencies
162.400 MHz
162.425 MHz
162.450 MHz
162.475 MHz
162.500 MHz
162.525 MHz
162.550 MHz
6
Basic Operation
RCL
RCL
119.10 MEM121.80
119.10 MEM124.55
119.10 WTH162.40

Intercom
Function When two headphone and microphone jacks are
connected to the SL40, these headsets can be used as a
voice-activated intercom.
When you select the Intercom function
with the installed selector switch, the
intercom function is enabled. The
Volume control will control the
headphone listening level. The receive
function will automatically become
active when a signal is detected.
Frequency monitoring will be disabled
when the intercom is selected. An “I” is
displayed in front of the standby
frequency to indicate the Intercom
function is selected.
The Intercom Squelch Sensitivity can be
set in the System Functions.
Stuck Mic The SL40 helps protect you from a situation where the
microphone may get stuck in the ON or Transmit
position. If the microphone is keyed for longer than 35
seconds, the SL40 will return to the receive mode on the
selected frequency.
A flashing “Stuck Mic” message will
display until the transmit key is released.
System Functions
The SL40 includes a number of System Functions that
give you more information about your communication
equipment. Press and hold the MON button for about
three seconds to reach the System Function. Turn the
Large, outer knob to display the available functions.
Software
Version The Software version is available for reference when
you contact Technical Support.
7
System Functions
121.50 Stuck Mic
119.10 I121.80
SW VER 1.00

RFLVL The RF Level function shows the relative signal strength
of the frequency you are listening to. The range
displayed is between 0 and 255. The value will
constantly change as you are viewing it as signal
conditions change.
NOISE The Noise Level function shows the relative received
noise level of the frequency you are listening to. The
range displayed is between 0 and 255. The value will
constantly change as you are viewing it as signal
conditions change.
8
System Functions
RFLVL 123
NOISE 017

Intercom
Squelch The Intercom Squelch Sensitivity can be set to match the
sensitivity for your system and personal needs. The
typical useful range is approximately 200 to 250, with
the higher number being more sensitive. Turn the Small,
inner knob to change the sensitivity value.
Headphone
Level The Headphone Level function allows you to adjust the
headphone audio level. Turn the Small knob to change
the value. Setting the value to 0 slaves the headphone
audio level to the volume control knob. The range is
from 0 to 255.
Intercom
Audio Level This function adjusts the Intercom Audio Level. Setting
the value to 0 slaves the intercom level to the volume
control knob. Turn the Small knob to change the value.
The range is from 0 to 255.
Sidetone LevelThis function displays and adjusts the sidetone audio
level. Turn the Small knob to change the value. The
range is from 0 to 255. Setting the value to 0 slaves the
sidetone level to the volume control knob.
9
System Functions
HphLv 123
IcmLv 123
SidLv 123
I CM S Q 241

Base
Station
Lock Out
This function allows you to control the access to the
front panel controls to protect its use as a Base Station.
Turn the Small knob to change the value. The value sets
the control for the currently displayed active and standby
frequencies.
Locks Value Function Result
000 Normal mode All functions are
available
001 and 003 Flip/Flop key locked. The Flip/Flop key is
disabled. The Active
frequency is fixed.
The Standby
frequency may be
changed for
monitoring.
002 and 006 Initial Active
frequency is locked. The Active frequency cannot be changed.
The Standby can be
changed. The
Flip/Flop key
operates, but the
original Active
frequency cannot be
changed when it is
toggled to the
Standby location.
004 Locked frequencies. Both the Active and
Standby frequencies
are locked and
cannot be changed.
They can be toggled.
005 and 007 Full locked. Both frequencies are
locked. The
frequencies cannot
be changed or
toggled.
10
System Functions
Locks 000

SL40 Specifications
Features
760 Communication Channels
Frequency Range: 118 to 136.975 MHz
Active and Standby Flip/Flop Frequencies
Volume Control
16-Character High-Intensity Alphanumeric LED Display
Automatic Display Intensity Control
Backlit Keypad Controls
Transmit Status Indicator
2x8 Frequency Memory and Recall
Stores/Recalls Eight User-Defined Frequencies
Stores/Recalls Previous Eight Frequencies
Frequency Monitor Function (listens to standby while
monitoring the active)
Voice Activated Intercom
Dedicated Emergency Channel Selector
Upgradeable to Include GPS Option
Squelch Test Function
Stuck Mic Time-Out - 35 seconds
Performance
Transmit Power: 8 watts Carrier Power (28 watts Input Power)
Input Voltage Range: 10 to 40 VDC
Operating Temperature Range: -20° to +55° C
Certified TSO C37d (transmitting)
Certified TSO C38d (receiving)
Certified TSO C128 (Stuck Mic)
11
SL40 Specifications

Physical
1.3” (H) x 6.25” (W) x 10.5” (D)
Weight: 2 lbs
12
SL40 Specifications

Notes
13

© 1997 by II Morrow Inc.
2345 Turner Rd., S.E.
Salem, OR 97302
U.S.A.
Phone [phone]
800.525.6726
In Canada 800.654.3415
FAX [phone]
http://www.iimorrow.com
Part #560-0954-01
March 1997
II MORROW
VISIONARY THINKING TODAY